Can someone please give me the (A) answer? Plz don't answer if you don't know! This is a test :)

In a class of 20 students, what democratic form of governance makes the most sense

In plate tectonics, why is the north american plate tectonically inactive?

Renaldo and nasreen build an electromagnet by wrapping a wire around a nail and connecting the wire to both terminals of a battery. when they test the electromagnet, it can pick up 6 paper clips. their teacher wants all groups to pick up at least 10 paper clips. what could renaldo and nasreen do to increase the number of paper clips their electromagnet picks up?