Examples of sole proprietorships include independent workers, a tax preparer running his own business, and freelance writers. Other options listed in the question do not qualify as sole proprietorships because they involve multiple parties or shared ownership. Thus, the correct answers are C, E, and F.
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Sole proprietorships are businesses owned and run by one person. Examples from the list include independent workers, tax preparers running their own businesses, and freelance writers. The other options involve multiple parties and do not qualify as sole proprietorships. ;