Which of the following is correct?

Can you please fully explain why the chosen answer is correct AND also why the other options are incorrect.

Suppose the government approves new legislation that improves the security of employment. In terms of the wage-setting/price-setting model: Select one: O a. The wage-setting curve becomes flatter. O b. The wage-setting curve moves down. O C. We move along the wage-setting curve, to the right. O d. The wage-setting curve moves up