Which of the Following Is a Provision of Section 8(a)

Which of the following is a provision of Section 8(a) of the National Labor Relations Act?

A) prohibits unions from engaging in unfair labor practices that interfere with a union election
B) makes it an unfair labor practice for an employer to restrain employees from forming and joining unions
C) enables employees to opt out of unions by organizing a decertification election
D) permits employees and union officials to engage in union solicitation on company property