阅读下列短文，从每题所给的四个选项(A、B、C和D)中选出最佳选项。
At the middle school level，there are many academic clubs in which students can participate. Students can choose clubs that focus on an area of interest.
Mathcounts Club
Mathcounts tries to increase excitement towards mathematic achievement. It hopes to provide students with the foundation for success in science，technology，engineering and mathematics careers. Schools select individuals and teams to participate in competitions. Local competitions are held in February with winners progressing to state competitions and then on to the national level. Mathcounts works to challenge students' math skills，develop selfconfidence and give rewards for their achievements.
Envirothon
The Envirothon program focuses on natural resources knowledge and exposes students to diverse environmental issues，and ecosystems(生态学)．The ecology field competition for fivemember middle school teams offers competitions in wildlife，soil，forestry，and current environmental issues. Students work and learn in middle school clubs and can compete at the local and state level.
Future Problem Solvers
Future Problem Solvers is an academic club that uses a sixstep process to solve problems that may happen in the future. Students who are in the talented and gifted program，who like to “think out of the box”，or who enjoy thinking about futuristic problems may like this club. Teams made up of four students read future scenes and write up solutions in a booklet using the sixstep process. Teams that score high enough can go to the state competition and then to the international competition.
Builders Club
Builders Club is open to any middle school student who wishes to perform community service. Each Builders Club is cosponsored by a Kiwanis club and a middle school. The members learn by doing，and they learn organization，teamwork，and leadership. Builders Clubs can sponsor a “Teacher of the Year” program，provide a recycling collection point，organize canned food and clothing to support local shelters.
Middle school academic clubs offer students a place to explore interests or talents. The clubs they join in middle school can help guide choices in high school and beyond.
Students choosing Mathcounts Club could ________.

A．get help in science careers

B．enjoy solving future problems

C．perform community service

D．study wildlife and soil

If you enjoy thinking about futuristic problems，________ is a good choice for you.

A．Mathcounts Club

B．Builders Club

C．Future Problem Solvers

D．Envirothon

The students who are not interested in competitions would like to choose ________.

A．Mathcounts Club

B．Builders Club

C．Future Problem Solvers

D．Envirothon

What is the common feature of the four clubs?

A．Competitions.

B．Leadership.

C．Scientific researches.

D．Exploration of talents.