45.A majority of the workers at Packing & Shipping Inc. sign authorization cards. Union organizers present the cards to the firm and ask for formal recognition of the union. The employer

a. is required to honor the request on a showing of majority support.

b. cannot recognize the union without an election.

c. must petition the National Labor Relations Board to hold an election.

d.may voluntarily recognize the union, but is not required to do so.