The first are true the last are false sorry if this doesn't help :(
I think it would not make a difference as you can learn the same things.
In my opinion, they do not only reveal what will happen, but also manipulate events. When Macbeth approached the witches, they could have concealed the truth from him and just let the events unfold, but they didn't do it. They told him about the prophecy, thus initiating the events that soon followed. If they hadn't told him the truth, Macbeth might have never killed Banquo, Duncan, and the rest in order to become king. So yes, they manipulated events and caused a great tragedy.
By adding periods and taking out a bunch if the ands.
Answer:
A, The science of solar energy.
- sorry if its incorrect. i hope this helped at all.