Ok here
the ques says .. Vous et vos amis cherchez un petit travail pour les vacances - You and your friends are looking for a little job for the holidays
keep this in mind .. read all the options and try to translate them into english in you mind
Jean voudrait pratiquer un sport .. meaning Jean would like to practice a sport
so look at the options .. C- says Vous allez donner des cours de foot à des enfants .. meaning .. You wil teach football to kids .. so 12 is C
Paul veut tout faire pour protéger l'environnement. .. means that Paul wishes to do everything to protect the environment
D- refers to cleaning the beach
Vous allez aider à nettoyer les plages après l'été.
You will help clean up beaches after the summer
so answer is D