If you want to change a word ending in -dor to feminine form, you add an a at the end. Your answer is D.
It means Slide hope I helped :)
Answer:
1. c. missing tilde
2. b. needs accent
3. a. needs capitalization
4. d. misspelled word
Explanation:
1. It's missing the tilde over the "n" in años.
2. The accent in México is missing.
3. Perú is in lowercase.
4. It's "eres" not "erres".
