A、It is a national trend. B、It is a national pastime. C、It is an American tradition. D、It is a newly formed habit. B

In America, self-improvement is a national pastime, Every year, more and more Americans spend there leisure time trying to improve themselves in one way or another.
    One popular form of self-improvement is the search for physical fitness. Thousands of Americans who never exercised are now out on the streets, jogging in fashionable running suits and expensive sports shoes. They boast of how many miles they run each day and of how many pounds they lose each week. Others are turning to swimming, tennis, dance, and the martial arts to improve their physical fitness.
    Instead of running around the park in the morning or evening, other Americans are studying yoga, a Hindu philosophy or doing serious thinking quietly in their homes. They are seeking to improve themselves by finding peace and calmness.
    Adult education is another form of self-improvement.  After a hard day’s work, many Americans take evening courses at a local high school or college. There they can study a variety of subjects. Often these people are preparing to return to the job market or trying to qualify themselves for better jobs. A mother busy raising her children might attend night school to learn secretarial skills. A secretary might return to study accounting. Some retired people go back for the education they missed at an earlier age.