Neither speaker expresses an opinion. Nobody refers to the possibility or impossibility of performing an action.

Neither speaker expresses an opinion. For Daniel, the right motivations are necessary for being good, but that doesn’t imply an opinion about whether there exist actions that fulfill that necessary condition but are not good.

Neither speaker expresses an opinion. Although Daniel refers to the right motivations, he does not specify the particular motivation of wanting to fulfill a moral obligation. We do not know what constitutes a right motivation.

This is a point of disagreement. Daniel thinks the right motivations are required to be good. Carrie thinks the right motivations are not required. So, Carrie believes an action performed with the wrong motivations can be good, as long as it fulfills a moral obligation.

Neither expresses an opinion. Daniel believes the right motivations are necessary to be good, but that doesn’t imply a belief about whether they are sufficient to be good. He also doesn’t say whether being motivated by duty constitutes a right motivation.