Final answer:
In the United States, women working full-time earn approximately 77 cents for every dollar earned by men working full-time.
Step-by-step explanation:
The correct answer is a. 77 cents. In the United States, women working full-time earn approximately 77 cents for every dollar earned by men working full-time. This wage gap is often referred to as the gender pay gap. It is a persistent issue that has been studied and highlighted by various organizations and researchers.