Which One of the Following Strategies Is NOT a Strategy

Multiple Choice

Which one of the following strategies is NOT a strategy that is commonly used to increase a public employer's cost of continuing to disagree with a union bargaining proposal?

A) A threat to "blow the whistle" on a questionable management practice.
B) A threat to conduct a recall election.
C) A threat to withdraw the political support of union members
D) Malicious obedience or "working to rule" in order to slow down work
E) All of these are commonly used strategies.