Choose the sentence that best matches the context of the word reticent as it is used in the following example.

we could talk about anything for hours. however, the moment i brought up dating, he was extremely reticent about his personal life.

a. he remained indifferent toward others.
b. he was usually a very quiet person.
c. he was an unsympathetic person.
d. he had nothing interesting to say.
e. he wouldn't readily reveal his feelings.