Final answer:
The question does not directly relate to why 'one girl is not enough for Jethro'; instead, it's about whether Jethro should do all the camping work due to his absolute advantage in camping skills. The best approach is for the group to share the tasks despite Jethro's superior skillset to promote teamwork and balance.
Step-by-step explanation:
The question does not provide enough context regarding Jethro's situation to definitively choose an option A through D with complete confidence. However, based on the additional reference information provided, the key detail is that Jethro has an absolute advantage in all camping skills among his group of friends.
The concept of absolute advantage refers to the ability of a person to perform a task more efficiently than others. In terms of teamwork and efficiency, it would not be reasonable for Jethro to do all the work just because he excels in everything.
This is because, from an economic and social standpoint, it is beneficial for all team members to contribute to the shared effort to ensure a balanced workload and the development of skills. Moreover, having Jethro do everything could lead to exhaustion or disengagement among the other team members.