The evidence that supports that "black holes are incredibly powerful cosmic forces" are A and C. The other two do not have any say on how powerful a black hole is.
Answer:
for my opinion its earthquake
The way Louise demonstrates appropriate behavior in a group discussion is:
A. She encourages the contributions of other group members: Louise takes into account the observations and comments of the other participants as in “Thanks for the reminder, Mark” “Kristin, how much have we raised in candy bar sales so far?”
B. She comes prepared with information that is important to the discussion: Louise brings useful information to the discussion in order to support her idea of placing an order to buy a scoreboard. Examples are: “The total cost with shipping is $1,400.00, but with the sponsorship money, the total comes to only $580.” In this example, Louise shows numbers and asks for information in order to decide if the purchase is possible.
