Ummm i actually dont know lol i swear i knew im sorry man or women ( im not trying to assume your gender
The correct answer should be B) Water vapor and carbon dioxide in the atmosphere trap heat.
The trapped heat cannot leave the atmosphere and as it is trapped, it increases the heat of the planet.
C, the amount of oxygen produced is the dependent variable since that is what is being measured and it is dependent on which substance is being tested
The answer is going to be Rubidium. hope that helped