The answer is for #4 is: A - Portugal colonized Brazil, and other nations backed privateers and explorers.
market economy? I think so at least I remember doing something like this last year
I'm taking a stab at it and say the last one. sorry if I'm wrong! XD
Buddhist monks from different cultures would share Sanskrit. It was also carried on trade routes was learned in universities in other lands. Later it was forced upon other nations that the Gupta Empire would conquer.
I hope this helped!! (:
