If a document has several topics, and the first topic heading is set in 15-point bold Cambria type, the buttons) can be used to apply those settings to all of the other topic headings.
A. Copy and Paste
B. Cut and Paste
C. Format Painter
D. Text Effects

C. Format Painter

Explanation:

The format painter tool in Word is used when the intention is to copy formatting from one document or item to another. For example, if a document has several topics, with the first topic heading set in 15-point Cambria font, the format painter button is used to apply those settings to all other topic headings. In other word, the format painter is used to copy formatting to another section of a text.