The bill that required the NLRB to certify a union if the majority of employees signed union authorization cards, stated a procedure for the invocation of the first collective bargaining agreement, and imposed penalties for employer violations of certain unfair labor practices was called the:

	a.	National Labor Relations Act.
	b.	Taft-Hartley Act.
	c.	Secret Ballot Protection Act.
	d.	Employee Free Choice Act.
	e.	Employment Relations Act.