(单选题)The Rehnquist Court (1986-2005) was noted for its revival of judicial enforcement of federalism, emphasizing the limits of the Constitution's affirmative grants of power and the force of its restrictions on those powers. It struck down single-sex state schools as a violation of equal protection, laws against __________ as violations of substantive __________, and the line item veto, but upheld school vouchers and reaffirmed Roe's restrictions on abortion laws.•