Final answer:
Option D, 'Senator Muzzo lives in Washington, D.C.,' has the correct capitalization according to the rules of capitalizing titles, proper nouns, and abbreviations of locations.
Step-by-step explanation:
The sentence with correct capitalization is Sentator Muzzo lives in Washington, D.C. This is because proper nouns and locations, such as "Senator," "Washington," and the abbreviation for the District of Columbia, "D.C.," should always be capitalized. The abbreviation for District of Columbia includes periods and both letters should be in capital letters. Here are the rules applied:
- Capitalize titles before names, such as "Senator".
- Capitalize proper nouns, such as "Washington".
- Capitalize both letters in the abbreviation for District of Columbia, "D.C.".
Therefore, option D is the sentence with the correct capitalization.