Mark the letter A, B, C, or D to indicate the sentence that is closest in meaning to each of the following questions

A. Lam's mother promised to buy him a new bicycle if he stopped eating junk food.

B. Lam's mother promises to buy him a new bicycle if he stops eating junk food.

C. Lam's mother will promise to buy him a new bicycle if he stops eating junk food.

D. Lam's mother had promised to buy him a new bicycle if he stopped eating junk food.

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.

A. Mai's father said she would recover quickly if she follows the doctor’s advice.

B. Mai's father said she will recover quickly if she followed the doctor's advice.

C. Mai's father said she would recover quickly if she followed the doctor's advice.

D. Mai's father says she would recover quickly if she followed the doctor's advice.