The correct answer is A. two weeks.
The length of one day on the Moon is approximately 29.5 days, which means that the daylight lasts half of it and that comes at little over two weeks, or 14.75 days of daylight and 14.75 days of night. Putting it in the simplest way, the Sun needs 29.5 days to move from a begging point to the same one in that period.
