He kept those secrets for more than 50 years before he felt compelled to answer the questions that had haunted him since the war. (Para. 15)
A、He didn’t tell anyone his secrets until more than 50 years later when he was forced to answer the questions that had come to his mind repeatedly since the war.
B、He didn’t tell anyone his secrets until more than 50 years later when he realized the necessity of answering the questions that had come to his mind repeatedly since the war.