She remembered how reticent her father had been about his past.

Analyze the question: You need the word opposite in meaning to reticent.

Explain the concept: Reticent means reluctant to speak or share information; reserved, tight-lipped, uncommunicative. Its antonym is a word meaning open, communicative, or willing to share.

Solution:

The sentence says the father was reticent about his past, so he did not like talking about it. We need the opposite: someone who is open and willing to talk.

• A. unpredictable: means not easy to foresee. It has nothing to do with willingness to speak.
• B. insinuating: means hinting at something indirectly, usually something unpleasant. It is not the opposite of reserved.
• C. difficult: means hard to deal with. It is vague and not an antonym.
• D. forthcoming: means willing to give information, open and communicative. This is the direct opposite of reticent.

Answer: D. forthcoming

Tip: In antonym questions, first find the core meaning of the word (reticent = reserved or silent). Then test each option against "the opposite of silent or reserved". Other synonyms of reticent are taciturn, reserved, and close-lipped. Their opposites are talkative, open, communicative, and forthcoming.