In an economic strike, workers refuse to work until:

A) The employer meets their demands for conditions of employment.
B) The NLRB rules they must return to work.
C) The contract expires.
D) Their strike funds run out.

In an economic strike, workers refuse to work until the employer meets their demands for conditions of employment, such as better wages, benefits, or working conditions. This type of strike is not related to specific unfair labor practices or contract disputes, but rather an attempt to improve the workers' economic situation.