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The answer is B. Controlling Trade. I have taken the test. Tip: Try to talk more formally it is more beneficial, and if you could speak more formal, you would be able to be understood better.
Both words can be used as either nouns or verbs, so that's not a foolproof distinction. But “affect” is almost always a verb
Flower is a concrete noun
I hope I've helped!
If you mean reading skills then read daily for 20-30 minutes, practice is the most important factor. If you do not know how to pronounce any word then search it on youtube. Read out loud near your friends and family members to improve it.