Answer:
A. By offering praise
Step-by-step explanation:
John is surprised when Young Graham decides to help him, in addition, he is touched by the initiative, solidarity and commitment that Graham put in that help, allowing all work related to the boat to be completed more easily, in every way, mainly psychologically, since John received strong support with this attitude from Graham that helped him a lot. In this case, John's reaction was to praise Graham as a way of thanking and acknowledging the help.