What is the correct understanding of sentences 15-20?15. I am as old as, if not older than, most faculty members.

A、Iamasoldas,andperhapsevenolderthan,mostfacultymembers.;
B、Iamasyoungas,andpossiblyevenyoungerthan,mostfacultymembers.;
C、IfIamolderthanmostfacultymembers,Iamasoldasthem.;
D、IfIamasoldasmostfacultymembers,Iamolderthanthem.