According to our texts discussion of the Equal Protection Clause, which statement below is correct with regard to admission

fees to a Texas state park?

	a.	Texas can charge a male adult a higher fee than a female (they are bigger and take up more space).
	b.	It would be unconstitutional for Texas to charge a fee for admission to a state park. All state parks are free.
	c.	Texas can charge a different fee to different people based on a persons annual income.
	d.	It would be unconstitutional for Texas to charge a higher fee to out-of-state residents than the fee charged Texans.