Answer:
1. = c, 2 = d, 3 = b, 4 = a
i think i need to have more info in order to get this right sorry.
Put the verb in the yo form of the present tense. Then, remove the o. For an -ar verb, add an -e.
For example, if you wanted to command me to speak - hablar..
<span>Conjugate for regular present tense ("hablo") Take off the -o and you have "Habl", then add an e and you have "Hable </span>
The correct word would be "Quien".
So, it would be "<span>¿</span>Quien compró los comestibles?"