Either dentist or dentistry
The author is using B. INDIRECT CHARACTERIZATION.
Indirect Characterization refers to what the character says or does. In the above passage, the author wrote what the character does. We, as the readers, only infer what the character is all about because we cannot read his mind or "get inside his head".
Direct Characterization refers to what the narrator directly says or thinks about the character. The reader is told what the character is like.
Add 100 and 20% you would get a total of 120%
