胎先露指（）。

A.胎儿长轴与母体长轴关系

B.胎儿在子宫内所取的姿势

C.最先进入骨盆入口平面的胎儿部分

D.胎儿指示点和骨盆关系

E.胎儿枕骨和骨盆关系

Left-handed persons suffer more frequently than do righthanded persons from certain immune disorders, such as allergies. Left-handers tend to have an advantage over the righthanded majority, however, on tasks controlled by the right hemisphere of the brain, and mathematical reasoning is ply under the influence of the right hemisphere in most people.
If the information above is true, it best supports which of the following hypotheses

A．Most people who suffer from allergies or other such immune disorders are left-handed rather than right-handed.

B．Most left-handed mathematicians suffer from some kind of allergy.

C．There are proportionally more left-handers among people whose ability to reason mathematically is above average than there are among people with poor mathematical reasoning ability.

D．If a left-handed person suffers from an allergy, that person will probably be good at mathematics.

E．(E) There are proportionally more people who suffer from immune disorders such as allergies than there are people who are left-handed or people whose mathematical reasoning ability is unusually good.