Prepositional phrase is the answer.
It is not correct to state that endurance training develops hand-eye coordination (Option D), since endurance training has to do with training the aerobic system. Endurance exercises help people improve their breathing and circulatory systems and, at the same time, they allow the person stay healthy and fit. Moreover, the American Heart Association highlights the importance of performing endurance exercises regularly along with strength, balance and flexibility so as to reduce the risk of many diseases such as diabetes, heart disease and stroke.
Answer:
many Americans opposed the war on moral grounds
