Yes, it seems like your sentence's grammar is perfect. The only problem is after your two sentences. You wrote "It is correct grammar?". This is a statement with a question mark at the end. To fix it, switch "It" and "Is". You'll get "Is it correct grammar?" Hope this helps!
The answer is B.
The structure of an argumentive essay is
Your claim and three supporting details
One essay for each detail
Restate your claim and summarize the information in your essay
Umm you didnt put the rest i cant answer this sorry