As the number of firms in an oligopolized market:

a) decreases, and provided the firms do not successfully collude, the price charged by the firms and the total quantity produced will both decrease.

b) decreases, and provided the firms do not successfully collude, the market approaches the competitive market outcome.

c) increases, and provided the firms do not successfully collude, the market approaches the competitive market outcome.

d). increases, and provided the firms do not successfully collude, the market approaches the monopoly outcome.