With expressions such as 'es raro que' you need to use the subjunctive form of a verb which is slightly different than the present, indicative form. So, the 'normal' form of ir for third person plural would be van. However, we need the subjunctive form here, which is vayan.
This means that the correct answer is A. Vayan a la escuela los sabados.
The form ven doesn't exist.
Won’t let me type it in so here’s a picture of the answers
You will not haved, study
The answer is B. conozcas.
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1. Pepe es español, mientras que sus amigos Luis, Jorge, Peppa y MariCarmen20 son chino, japonés, mongola y marroquí, respectivamente.
2. The rule is that in nationalities, opposite to Enslish's rule, the first letter is not capital.
3. In my house we don't speak the same language as they speak in Alejandrina's house, we speak a different language, which is much stranger, it is Suahili.