Answer: Union
Step-by-step explanation:
The options to the question,:
A Open
B. Managed
C. Union
D. Closed
E. Agency
From the question, we are informed that Howard Cho has been hired by Greenwood Enterprises to work on an assembly line in its small engine division and that he understands that he will be on probation for 30 days and then must join the union. This implies that Cho enterprise has a union shop.
A union shop is a form of a union security clause whereby the employer may employ workers who are into the union or those who don't but those that are not yet union members will have to join after a 30 days period.