Final answer:
An unfair labor practice (ULP) would be if the union fines a member for criticizing union actions. This would be considered unfair because it restricts the member's freedom of speech and discourages open discussion and dissent within the union.
Step-by-step explanation:
An unfair labor practice (ULP) would be if the union fines a member for criticizing union actions. This would be considered unfair because it restricts the member's freedom of speech and discourages open discussion and dissent within the union.
On the other hand, the union distributing buttons for employees to wear to work is not an unfair labor practice. It is a common practice for unions to distribute buttons, stickers, or other items as a way to promote solidarity and raise awareness about union issues.
A supervisor refusing to give a union member preferential treatment is also not an unfair labor practice. The supervisor is expected to treat all employees fairly and not show favoritism based on union membership.
Overall, only the act of fining a member for criticizing union actions would constitute an unfair labor practice.