When an employer is charged under Section 8(a)(3) for refusing to hire an applicant whom the employer suspects to be a union organizer, which of the following can the employer use to defend its decision? A. By citing the employer's closed shop agreement. B. By citing the employer's Section 7 rights to defend against a union's unfair labor practice. C. By raising a reasonable question as to the applicant's actual interest in working for the employer. D. By agreeing to establish and administer an in-house union. Under the NLRB, unfair labor practice strikes are: A. Unprotected activity B. Mandatory subjects of bargaining C. Illegal D. Protected activity Secondary boycotts A. generally are legal provided the boycott is peaceful. B. generally are legal provided the boycott does not involve public employees such as law enforcement personnel or school teachers. C. are neither expressly permitted nor prohibited under federal law. D.generally are illegal