Question

jack Collins threw light on the importance of adequate rest _____ a proper rehabilitation process for athletes saying the body gets fitter during the rest period after exercise and not during it

a. and
b. but
c. since
d. than​

Answer 1

than

It is because both sentences are comparing which means adequate rest is better than rehabilitation process

Finally the answer is 'than'

Answer 2

* Than is the correct option that brings proper meaning to the the above sentence Jack Collins through light on the importance of adequate rest than a proper rehabilitation process for athletes saying that body gets fitter during the rest period after exercise then during an exercise.

* Here than is the correct word because here to cases are compared with each other and which case gives the best result.

* and mostly in comparison cases then is the appropriate word to be used.