but option B said optimizer and not maximizer and there's a difference between those two words

I think correct answer is B. SG v2020: "The Product Owner is accountable for maximizing the value of the product resulting from the work of the Scrum Team. " Instead of maximizing, I think it is okay to use optimizing too. But it is questionable.

B is correct

someone has to put up with the customers

How to maximize the value? Only with the customers. The product have no value without a customer.

B is correct Product Owner The Product Owner is accountable for maximizing the value of the product resulting from the work of the Scrum Team. How this is done may vary widely across organizations, Scrum Teams, and individuals.

Value optimizer is the right answer.

B is the correct answer

B. Optimiseur de valeur. Le Product Owner est généralement considéré comme un "Optimiseur de valeur" dans le contexte de la gestion de projet Agile, notamment dans la méthodologie Scrum. Le rôle du Product Owner consiste à maximiser la valeur du produit développé par l'équipe de développement pour les clients, les utilisateurs et l'entreprise. Il travaille en étroite collaboration avec l'équipe de développement pour définir les fonctionnalités et les priorités du produit en se basant sur les besoins et les exigences des parties prenantes. L'objectif principal du Product Owner est de s'assurer que le produit répond aux besoins du marché et qu'il apporte le maximum de valeur ajoutée aux utilisateurs.

I think correct answer is B.

These answers and sources should be updated; defaulting to the scrum guide where possible

Product Owner's core responsibility is to maximize the value of the product

Correct Answer is : B "The Product Owner is accountable for maximizing the value of the product resulting from the work of the Scrum Team. How this is done may vary widely across organizations, Scrum Teams, and individuals." src: "https://scrumguides.org/scrum-guide.html#product-owner"

Correct Answer should be : B