The quality of one's memory can generally be judged on the basis of his or her

The quality of memory is generally judged by the power of retention, how well material is held over time.

Analytical ability (B) concerns reasoning and breaking down problems, not memory quality.

Communication skills (C) relate to expression, not the retaining of learned material.

Mathematical numeracy (D) is a numerical skill, unrelated to memory strength.

Memory involves learning or registration, retention, recall and recognition.

Strong retention with accurate recall marks a good memory.