[单项选择]

Culture (文化) unchangingly molds (影响) human biology. Culture encourages certain activities, discourages others, and sets standards of physical health and attractiveness (吸引力). Sports activity, which is influenced by culture, helps build phenotype (具有共同类型的一类有机物). American girls are encouraged to pursue and so, they do well in -competitive track and field, swimming, and diving. Brazilian girls are encouraged to avoid public activities. In Brazil fewer females swim, drive, and run than is the case in America. Culture standards of attractiveness also affect athletic activities. Americans run or swim not just to compete but to keep trim (漂亮的) and fit (健康的). Brazil’ s beauty standards accept more fat, especially in female buttocks and hips. Years of swimming mold an enlarged upper torso, a massive neck, and powerful shoulders and back. Successful women swimmers tend to be big, strong, hard and bulky, but Brazilian culture says that women should be soft. A Brazilian beauty should h
A. Because successful women swimmers tend to be big, strong, hard and bulky, but Brazilian culture says that women should be soft.
B. Because Brazilian women don’t like swimming and running.
C. Because Brazil’s beauty standards accept less fat, especially in female buttocks and hips.
D. Because Brazilian girls are encouraged to take part in public activities.