The main idea of the passage is about______.

A．value of allelomimetic behavior in vertebrate and invertebrate species
B．definition and distribution of allelomimetic behavior
C．relationship of allelomimetic behavior to the survival of the fittest
D．personality factors that determine when an individual animal will show allelomimetic behavior

A．tests have been designed to settle the cholesterol dispute
B．drugs have been tested to reduce the amount of the substance in blood
C．low cholesterol foods or anti-cholesterol drugs or both can reduce the chance of a heart attack
D．none of the statements mentioned above is correct