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.