Four out of ten women who diet end up heavier than when they started watching their waistline（腰围），a study revealed today. The research also showed that a large percentage of women started noticing the pounds creeping back on just 21 days after reaching their ideal weight.
Yesterday, Dr Ian Campbell of the Jenny Craig Weight Management Program said ： "In the UK 61. 4 percent of adults are over-weight or obese. Successful weight management requires a long-term commitment in order to lose weight successfully and for good. Dieting can be a real challenge so setting realistic goals and remaining focused on them is important. Otherwise as this research shows, women could end up heavier than when they started. "
The "Food, Body, Mind" report was publicized by Jenny Craig who quizzed 2，000 women aged between 18 and 65 who diet regularly on their attitudes, beliefs and behaviors around weight loss. Six in ten said they were on a diet then and one in five women said they were on a " continuous diet".
It found the most common triggers to start dieting was seeing their " reflection in the mirror"，preparing for a summer holiday or unflattering photos posted on social networking sites. Other popular reasons include comments by friends or relatives or their other half.
However, the study showed that one in ten give up within one day, while almost a fifth manage to make it to a week or more. The average is ten days. Many blamed pressure they put on themselves to lose weight too quickly for the weight gain, which leaves them with a bigger appetite than normal. Others blamed colleagues, who tuck into fatty lunches and snacks unaware of the effect it has on the dieters, while mothers' polishing off their children's leftovers（剩饭）was an-other common cause of weight gain.
Which of the following might be the best title for this article?

A．Three reasons to fail in dieting

B．Important things for successful diet

C．Obesity-a problem for 61. 4% adults in the UK

D．Four in ten women gain weight on diets

Women who go on a diet __________.

A．are all overweight or obese

B．are likely to gain weight again after reaching their ideal weight

C．all fail because they are not persistent enough

D．all end up heavier than when they start to diet

The underlined word "triggers" in Paragraph 4 probably means __________.

A．effects

B．examples

C．causes

D．imagination

Which of the following is NOT the reason that many people quit dieting very soon?

A．The pressure they put on themselves to lose weight quickly.

B．Colleagues who tuck into fatty lunches and snacks.

C．Reflections they see in the mirror.

D．Leftovers of children's taken by their mothers.