In an experiment the HYPOTHESIS is tested. The hypothesis is the assumption, that you make about something. Example would be, you believe (hypothesize) that the baking soda will react faster in vinegar than in water. You then test it out (or preform and experiment) to see if your hypothesis is correct or wrong.
A is your answer.
Water containing no salt is known as isotonic solution
C because if there isn’t enough of something, more can be added but if there is max capacity, nothing can be added
B because you can get cancer badly by smoking people smoke cause of stress the stress makes it worse to smoke
