The workers at an Amazon warehouse on Staten Island New York voted for collective bargaining representation with the Amazon Labor Union (ALU) in an election held in March 2022. The NLRB issued a certification of the union's exclusive representative status for all warehouse employees at the Staten Island facility.

Assume the ALU ends the strike, and all employees return to work before the parties reach a first collective bargaining agreement. However, the employees engage in a work slowdown after returning to work, taking excessively long breaks, and slowing down the operations on the job. Which should the employer do: a) fire the workers engaged in the slowdown; or b) file an unfair labor practice charge with the NLRB alleging that the union failed to bargain in good faith by engaging in the work slowdown? Explain your answer.