Stanny and johnson’s "weapons focus" experiment, investigating memory for crime scenes, found that

people are more likely to have a mask on to kill people then anything else

Explanation:

the actual answers are a, b, and d.

hello,

answer: a federal government has final authority on interstate/inter provincial  and international affairs, a confederation is one where the central/national government or authority is governing body what does not have final say over the same matters. hopefully this and i will try again if you don't like this answer : )

best of luck!