Final answer:
Based on the information provided, Bob's possible reactions to someone potentially pursuing his girl could be to confront them or ask for permission.
Step-by-step explanation:
Based on the provided information, it is difficult to determine Bob's reaction to someone potentially pursuing his girl with certainty. However, we can analyze the given texts to understand the possible reactions that Bob might have. In one text, Bob expresses his intention to confront the people he is looking for, indicating that he may choose option A) 'He'll confront them.' In another text, someone mentions that Bobinôt, who could be Bob, might get upset if another man shows interest in Calixta. This suggests that Bob might also choose option D) 'He'll ask for permission.'