What Did the United States Supreme Court Decide in National

What did the United States Supreme Court decide in National Labor Relations Board v.Exchange Parts Company,involving an employer who conferred new economic benefits on its employees just before a union election that the employer subsequently won?

A) The employer did not commit an unfair labor practice, because the employer only provided benefits, and did not make any threats.
B) The employer did not commit an unfair labor practice, because the employer did not expressly condition receipt of the benefits on voting against the union.
C) The employer did not commit an unfair labor practice, because the benefits were not significant enough to have effected the election.
D) The employer committed an unfair labor practice, and the United States Supreme Court ordered a new election.
E) The employer committed an unfair labor practice, but the National Labor Relations Act did not allow the United States Supreme Court to order a new election.