Final answer:
The NLRB would not likely consider allowing employees to distribute flyers for a cancer fundraiser while not allowing them to distribute flyers for a union as discriminatory.
Step-by-step explanation:
The answer is B: Allowing employees to distribute flyers at work for a cancer fundraiser while not allowing them to distribute flyers for a union. This is because the National Labor Relations Board (NLRB) is primarily concerned with protecting employees' rights to engage in collective bargaining and form or join labor unions. The NLRB does not consider promoting charitable causes, such as cancer fundraisers, as discriminatory.