Answer: B. Seo Yeon should set up an internal market, allocating 10 hours per week to each team member and allowing them to trade hours among themselves over the course of a month.
Explanation:
From the options given in the question, the solution that is likely to best allocate her time between the four team members will be option B "Seo Yeon should set up an internal market, allocating 10 hours per week to each team member and allowing them to trade hours among themselves over the course of a month".
Since the teams have different deadlines, she should allocate her time equally to the four teams and help them out based on their deadlines as those with nearer deadlines should be helped first. We should also note that she shouldn't allocate the whole 40 hours to a particular team as that's not fair and can bring about disunity.