As an English speaker the advice i give to someone who wants to learn English would be it does take time but it's actually not that hard to learn English you just need to keep practicing and try to talk with the words you know so you can get used to it.
In the passage Brutus claim to Cassius that is he going to be able to see thing that are not there and Cassius replies that he will work as a mirror for him and help him to see the things he don’t see and support that he is honest and trustworthy telling Brutus several bad behavior that would make him doubt of Cassius and finish saying “then hold me dangerous” meaning that if Brutus see Cassius doing that things, only then he could think that Cassius is dangerous.
A seems the most logical in this sense, since parents are portrayed (and majority do) sacrifice a lot so their children can live good and better lives than they did.
You will see the Full Moon at the highest point in the sky.
