sid operates his photography business from his back room home office.his house measures 7,000 square feet and his office takes up to 700 sqfeet of the house.he operates the business five days a week, 52 weeks a year, and 10 hours a day. assuming that he operates at a profit, what percentage of direct home office expenses may he deduct (rounded to the nearest whole number)?

a. 0%

b. 10%

c. 30%

d. 100%