The correct answer is: D. does Martin come
The verb “come” is conjugated as follows:
- I come
- You come
- He/She/It comes
- We come
- You come
- They come
In the sentence “Where does Martin come from?”, the subject is “Martin” and the verb is “come”. The subject is singular, so the verb must also be singular. Therefore, the correct answer is “does Martin come”.
The other options are incorrect because they use the plural form of the verb “come”. The plural form of the verb “come” is “come”. However, the subject in the sentence is “Martin”, which is singular. Therefore, the verb must also be singular.