Which of these standard organizational roles can be considered to know users/customers, and should therefore be brought in to the braisntorming sessions of the idea generation phase?

Which of these standard organizational roles can be considered to know users/customers, and should therefore be brought in to the braisntorming sessions of the idea generation phase?
A . Salespeople
B. All of them
C. Customer Support Reps
D. None of them

Answer: B