Answer:
Measure D
Explanation:
Measure D has the correct number of beats because the time signature is telling you that there should be four beats in a measure. The quarter rest (first symbol) has a value of 1 beat, then the two sets of eighth notes give you another beat (each eighth note has a value of 1/2 beat). Finally the half note gives you a value of 2 beats. You had all the beats that we've counted and get the four beats needed to correspond to the time signature.
