There are other equally good substitutes for exercise.
a. true
b. false

It would be completely false to say that there are other equally good substitutes for exercise. The correct option among the two options that are given in the question is the first option or option "a". Basically there is no replacement or good substitutes for exercise. I hope the answer comes to your help.

Because the discoveries were some of the oldest human remains.

C. congress was able to pay debts run up in the war