John puts 1250 psi of oxygen, 780 psi of nitrogen and 550 psi of helium in a scuba tank. what is the total pressure?

- "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)

true, if that is the context. if not, then setting. setting does not always mean surrounding, but also senses. what you hear, see, small, taste, and feel is all a part of the setting.

the answer is b i think