What does it mean to rebut something?
a. to strike with enough force to break an object
b. to oppose using evidence or an argument
c. to use an aggressive and intimidating tone
d. to allow an opponent to win an argument

to oppose using evidence or an argument  

your answer is c) experiments with water vapor showed that elements combine in specific proportions.

to me i think class room sitting education is better. i do online school and i have not learned a think haha. when i sit in the classroom i just sit there and kind of pay attention but still i get so far ahead in the class when im doing online i have nothing else better to do but play video games and i sit in school and learn and have friends and just actually learn. when i'm doing online i sit here listing to music and get on and and look up the answers i guess that is my fault for being a cheater. but to be honest i think sitting in the classroom is better.