Using language like “i think” and “in my opinion” can make your writing seem

a. vivid
b. direct
c. uncertain
d. confident

The answer is:

C. uncertain

By writting things like I think, you are taking the whole weight of the matter in what you think without providing facts or examples to your agument, by doing this you seem uncertain of what you are saying and also not well read about the matter. When you provide facts and researches about what you are talking, you can say certainly that you know something and defend it.

- "about the claims : -

making a claim is just a fancy way of saying that you're stating your main point.' claims are not just opinions. a claim tells what you think is true about a topic based on your knowledge .

about the country claims : -

a counterclaim is just the opposite of a claim. counterclaims are also provable and supportable by reasons and evidence. not just, 'because i said so.' when you're planning an argument, you need to know what the counterclaim might be so that you can make sure that you disprove it with your reasons and evidence your research." - (catherineroberts)