The answer is A~ Transition
I too was looking for the answer and ran across your question and seen there was no answer, so when I ended up finding the answer I had to come back and give it to you :)
NAFTA was signed on 17th December 1992 by all three members (Mexico, US, Canada) in their respective capitals and it came to power on January 1, 1994.
Answer: Explanation
Explanation: Explanation is to explain or tell the meaning of something
For the first one is most likely E.
the second one is also E.