I really get confused when it comes to dealin with That & Those. Followin is an example of such questions:

Aging is a property of all animals that reach a fixed size at maturity, and the variations in life spans among different species are far greater as that among individuals from the same species: a fruit fly is ancient at 40 days, a mouse at 3 years, a horse at 30, a man at 100, and some tortoises at 150.
(A) among different species are far greater as that among individuals from
(B) among different species are far greater than that among individuals from
(C) among different species are far greater than those among individuals of
(D) between different species are far more than that between individuals of
(E) between different species are greater by far than is that between individuals from

This is from 1000 SC quest..Q-71...ans is C.....While attackin this problem, I was left with two options B & C.Although I was able to arrive at d right ans on the basis of eliminatin "individuals from".
What if the option B wud hve included "Individuals of" rather than "Individuals from"