The answer should be D because it is stating something happy/nice at the beginning, but then it goes into the downside of the experiments. Which means you need a negative transition word
I agree with the other person, the other sentences are not complete. so in turn it must be: Wagon trains might include 100 wagons.
maybe
First photo = a list...
second photo (blackboard) = strategy
third photo (pyramid) =discussion
fourth photo (map) = ecosystems
Your answer is C. Acquaint yourself with the political situation in Africa, because the first letter is capitalized and all the proper nouns are capitalized. :)
