Which of the following accurately describes the taxation of sole proprietorships and freelancers?

a$)$ Sole proprietorships and freelancers are taxed separately from their owners.

b$)$ Sole proprietorships and freelancers are taxed at corporate tax rates.

c$)$ Sole proprietorships and freelancers report their business income on their personal tax returns.

d$)$ Sole proprietorships and freelancers are exempt from income taxation.