The correct answer is B. A sole proprietorship, because she will work alone from home.
Sole proprietorship is the simplest business one can start to operate. The person who owns the business is the same person who is responsible for the debts.
A good example of a sole proprietorship is local grocery, art studio or services of IT consultation.
Some of the advantages of a sole proprietorship is that, the owner is the one who enjoys the profits of the business, and its control.
Its disadvantage is the owner is liable for all the liabilities and losses.