Correct words

Choose the correct answer for each blank. Type in the letter for the correct answer in the space provided.
There is strong evidence that physical activity can help in the fight against cancer. Patients are turning to exercise in order to (51) (A. equip B. tackle C. attack D. avoid) their illness head-on. Regular workouts can help to (52) (A. eliminate B. hinder C. reduce D. diminish) fatigue and nausea, symptoms which are commonly associated (53) (A. by B. for C. to D. with) chemotherapy. They also improve muscle tone and stamina, (54) (A. increase B. heighten C. expand D. sustain) appetite and reduce cancer pain. One significant effect (55) (A. of B. to C. about D. through) exercise on cancer patients is its long-term recovery, (56) (A. why B. where C. which D. whom) survival rate increases by 50-60%. Most studies have (57) (A. presented B. exposed C. shown D. displayed) that the effect of exercise is most prominent (58) (A. with B. between C. within D. among) patients suffering from breast cancer. Previously it was (59) (A. believed B. assessed C. evaluated D. held) to be dangerous for cancer patients to exercise (60) (A. thus B. therefore C. but D. since) evidence of exercise on cancer has changed how people think. Many oncologists now believe that regular exercise is absolutely necessary for a patient’s recovery.
i chose the answer in red color but i am not sure of the answer