Answer:
D) have workers sign authorization cards.
Explanation:
The first step in organizing a union is to form a union committee, which probably Wilson and his other coworkers have probably done. Then they have to adopt an issue program which contains all the issues and topics that the union committee wants to address with the company's managers. Before presenting this issue program, the committee must get the majority of the workers to sign authorization cards so that the committee can represent them while negotiating with management. (this is the current stage in this case scenario).