Answer: B. It will gradually increase in size for approximately two weeks and it will gradually decrease in size for approximately two weeks.
Step-by-step explanation:
The moon orbits around the earth in 27.322 days. It is the brightest celestial body. It does not shine under own power instead glows with the reflected sunlight. Moon start dark and gets illuminated by the sunlight over the time of two weeks. When moon's disk becomes fully bright it gets fade, again returns to dark in about two weeks.