Why Is It Difficult for Sole Proprietorships to Hire Qualified

Why is it difficult for sole proprietorships to hire qualified employees?

A) Many large corporations are downsizing and outsourcing tasks, so there are less well-trained employees available for small businesses.
B) It is difficult for sole proprietorships to match the wages and benefits offered by large corporations.
C) There is more room for advancement within sole proprietorships.
D) Sole proprietorships prefer to spend their high profits on running the business, rather than on hiring qualified employees.
E) Sole proprietors prefer to do all the work themselves, so they don't want to hire qualified employees.