Bob, as treasurer of ClearView Corporation, had the duty to invest corporate earnings as he deemed best for the company. When ClearView Corporation went public, the new board decided that a committee of the officers would make such investment decisions. If Bob thereafter unilaterally contracted to purchase investment securities with corporate earnings as he had done many times before, such contract would be valid:

	a.	under apparent authority if the seller knew of Bob's past transactions.
	b.	because of ratification if the board did not know of his actions.
	c.	since Bob would have express authority.
	d.	since Bob had implied authority