Why Is Agency Important to Sole Proprietors

Why is agency important to sole proprietors?

A) Without agency,a sole proprietor's ability to engage in trade would be limited by the need to make purchases and contracts in person.
B) Without agency,which vests a sole proprietor with authority,a sole proprietor would not be able to enter into contracts.
C) Without agency,a sole proprietor's business would die with the proprietor.
D) Agency is not important to sole proprietors because sole proprietors cannot create an agency relationship