Answer: C) Tenemos
The verb tener (to have) needs to be conjugated in the 'we' form, because the speaker is talking about him/herself plus others.
Este restaurante tiene el peor menu porque todo es carisimo
Se puede nadar en este lago.
It is an impersonal sentence because it has no subject. This case is used "<u>se</u>", it is when we want to talk about the subject.
<h3><em><u>MissSpanish</u></em></h3>