Mark the letter A, B, C, or D to indicate the sentence that is closest in meaning to each of the following questions.
Question. 'You will boost your immune system if you exercise regularly,' said Tam.
A. Tam says that we'll boost our immune system if we exercised regularly.
B. Tam said that we'd boost our immune system if we exercised regularly.
C. Tam said that we'll boost our immune system if we exercised regularly.
D. Tam said that we boost our immune system if we exercised regularly.
Đáp án B
Dịch: Tâm nói rằng chúng tôi sẽ tăng cường hệ thống miễn dịch nếu chúng tôi tập thể dục thường xuyên.