[quote="asandeep"]It has traditionally been thought that all biological functions decline with the age, but according to the National Institute of Aging, certain important capabilities such as, the output of the heart under stress and intellectual vigor
, remain essentially unchanged.
A - same
B - the heart's output under stress and intellectual vigor
C - intellectual vigor and the output of the heart under stress
D - intellectual vigor and the effect of stress on the hesrt's output
E - the effect of stree on the heart's output and the intellectual vigor
I believe C is correct. The meaning is: 2 capabilities including output AND interlactual vigor.
A wrong because it misleading output under BOTH stress AND intellectual vigor
B suffers the same problem
D "the effect..." is not capability
E the same as D.
I have 2 month for gmat.