What they are looking for here is supporting details for this claim. As you read, hat reasons are given to go into war? Why is it said that this is good idea? Was it for national security? Was it to ensure our safety? It may not be directly stated, either. This may be something you need to infer.
Adoption or adaptation? Adaptation: the action or process of adapting. Adoption: the act of being adopted or adopting
I think it is A because i think 'because' and 'are' are the only subordinating conjunctions. I am not very sure by the way.
Frown - the opposite of break is repair and the opposite of smile is frown
