its B. Kennedy blockaded Cuba to stop soviet ships suspected of having nuclear weapons on board.
Answer:
I'd say you did a very fine job! You have a nice balance of description and facts.
The sentence "Well, they aren't that good" needs work, and could be changed, especially the phrase "aren't that good" seems quite passive.
You've used "a lot" repetitively, consider changing to "many" in the conclusion sentence.
Other than that its wonderful! Fix up tiny things and you should be very proud to turn that in.
The answer that you're seeking is, "Trains from different rail lines could use each other’s tracks." The standardization of rails allowed trains to use eachothers tracks and increase speed and efficieny in deliveries. Hope I helped!
B. Muslim rule would have spread more slowly in North Africa.
