Which sentence correctly uses the possessive form? A. My sister-in-law's graphic art's business is very successful and allows her to work from home. B. My sister-in-laws graphic arts' business is very successful and allows her to work from home. C. My sister-in-law's graphic arts business is very successful and allows her to work from home. D. My sister-in-laws' graphic arts business is very successful and allows her to work from home.