Going for C.
A. No mention of intention and actual pursuing of careers. Out of scope
B. The only close answer. Children of non-psychologists could still follow or not follow their parents careers. This doesnt help much.
C. correct ans.
With this we will know all the children who follow their parents professions and also we already know how many follow their psychologist parent. This will give the idea of more or less influence.
D. "planning" is again out of scope
E. "undecided" is out of scope
I'm crossing the bridge.........