4) Congress can't create laws regarding specific states and their export taxes. 5) Congress can not regulate slave trade. This became irrelevant after the year 1808. 6) Congress can not impose or create direct taxes on something.
It made it harder for immigrants to become citizens and made it so the president could imprison non citizens.
Should be the second answer (b)
It granted full toleration to all religions, including Christianity
Germany defended its aggression, claiming Lusitania had carried weapons and war supplies and was therefore fair game. As they continued to divert blame, British propaganda against them snowballed.