Answer:
John, who lives in Pittsburgh, is a blues singer.
Explanation:
Adjectival clauses commonly begin with words such as:
- Who
- Whom
- Whose
- That
- Which
In this case, you're using "Who" to combine the possibilities.
It seems to most closely mean, B. Enemy
a thick soft sticky substance made by mixing a liquid with a powder, especially to make a type of glue: flour-and-water paste. Yours is wrong