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.
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<span>Consisting of a pair of adults and their children. </span>
Presenting your speech in front of a mirror would be the best way to rehearse and evaluate your nonverbal behavior. This is because you can view your own actions and expressions yourself and determine what you do and do not like and what needs improvement. It would then be beneficial to present to family and friends afterwards to have them evaluate you after you view yourself. The other options focus strictly on your verbal behavior and you cannot self evaluate through those rehearsal methods.
