Ed Brickey wants to be certain he has done all he can do to help his business survive, so he has written a business plan. One advantage of developing the plan is that it（ ）.

A、forces Ed to think carefully about all aspects of his planned business
B、enables Ed to switch himself from a sole proprietorship to a corporation without any further paperwork
C、focuses Ed's attention on his personal talents and experiences
D、makes Ed feel how successful he is