Answer:
If this is to be answered in a common idea, option B is the answer.
The tone which is not effective for convincing people that they should subscribe to your perspective is definitely C) sarcastic. Nobody is going to listen to you if you offend or mock them.
You can grab your audience's attention by starting your essay off with a question, a quote, an interesting statement, etc.
Invade: Enter a place, situation, or sphere of activity) in large numbers, especially with intrusive effects... Synonyms for invade: occupy & takeover
Explore: travel through and unfamiliar area in order to learn about it.... Synonyms for explore: Tour & search