Both are used to help bread rise, active yeast requires proofing whereas instant or rapid-rise yeast does not. By proofing the active yeast in a warm liquid before mixing it into the recipe, you can ensure the yeast is activated (bubbles will form). With instant yeast, there is no way to tell until the bread does or doesn't rise. Either could be used for this recipe. However, we recommend active yeast if you are looking for the assurance the yeast is active and the rolls will rise.