In perfectly competitive market equilibrium, if a supplier raises prices to reflect its increased costs of input factors, he will

a.sell as many units as he needs to in order to "break even" or even to make excess profits

b.force all other suppliers to lower their prices so that they can try to break even

c.sell zero (0) units, and have to revert back to the original market prices

d.be able to sell his products by differentiating them to some extent for the buyers