GMAT Sentence Correction (SC) | Re: It has been demonstrated that individuals who participated

It has been demonstrated that individuals, who participated in competitive sportswhen they are in college, tend towards remaining physically active in their later years.

A) when theyare in college,tend towards remaining

B)when they were in college, are likely to be

C) when they were in college,were apt to be

D) when theyare in college, are apt to be

E) when they were in college,were liable to be

Source: It is from a book provided by my coaching institute.