Which of the following is TRUE according to the passage？

A．The voyage through the wormhole is a considerable challenge．

B．A team of crime fighters uncovers a criminal plot in Big Hero．

C．President Coin pushes Katniss to protest Peeta．

D．Penguins have to wrestle with problems in District 13．

The similarity that exists in the four films is that ________．

A．each of them is a branch of film series

B．all of them are concerned with positive energy

C．they all have the best actors and actresses in the world

D．the four films all have something to do with exploration