Which of the following statements is correct?

	a.	Lack of information about job qualifications can be a labour market barrier.
	b.	Market discrimination occurs when people have been deprived of an opportunity to develop their natural talents during their pre-employment years.
	c.	Compensating wage differentials refer to aspects of a job, such a lengthy vacations, that make it attractive to many people.
	d.	On average, women work more weekly pay hours than men.