In the Word Dermatologist, Identify the Root/combining Form and the Suffix

In the word dermatologist, identify the root/combining form and the suffix, and the correct meaning for each word element.

A) The root/combining form is ologist, meaning specialist; the suffix is dermat, meaning skin.
B) The root/combining form is dermat, meaning skin; the suffix is ologist, meaning the study of.
C) The root/combining form is dermat/o, meaning skin; the suffix is logist, meaning one who studies.
D) The root/combining form is dermatolog, meaning skin; the suffix is ist, meaning specialist
E) The root/combining form is dermato, meaning study of the skin and related organs; the suffix is logist, meaning the study of.