The native Americans already had the first 3 items. The British brought horses to the new world and the native Americans used them a good bit Civil War and after.
Honestly that strategy is up to you. Do whatever makes you most comfortable and helps you remember easily. Ideas however: things like flash cards. Maybe take notes on what you've learned and rewrite them multiple times. Have your friends quiz you and if you get something wrong, write it down and repeat until you remember it better. (Quiz less on questions you know the answer to, and more on what you don't know) Maybe ask if you can have a practice test? If your teacher offers that it's a good chance for useful notes. Also don't be afraid to ask your teacher for studying help. Good luck
Answer:
UNESCO's mission is to contribute to the building of a culture of peace, the eradication of poverty, sustainable development and intercultural dialogue through education, the sciences, culture, communication and information.
Chandragupta's strategy was to attack the borders first, then the capital city.
So, your answer is D.)