Réponse :
Bonjour,
a. Phobey should ignore the text messages.
Phoebe shouldn't send it to another friend.
b. Mickael is telling keith that Mark is a good guy.
Keith tells Mickael that Mark is a good guy.
c. Jessica should speak to the principal.
Jessica shouldn't be indifferent.
d. They should stop harassing him.
They shouldn't spread rumors.