The correct answers are:
One can immediately spot a strong similarity between the words "Disapprobation" and "Disapproval", and they are in fact related to one another, as disapprobation is defined as "total disapproval or condemn".
Knowing the definition of both disapproval and rejection, it is possible to point out a clear connection between the two, making them both members of the definition of disapprobation.
Another key element to spot would be the dis- prefix, which means "apart" or "away", which carries part of the meaning of these three words.