How would the volume of helium in a balloon be affected if the balloon was placed in a room where air temperature is lower? a. increase b. decrease c. no change

There is no reason to think the results are biased or not conducted properly but you should not assume the results are correct just because they were done in a laboratory so the answer would be c. it is likely to be reliable because the results support the conclusion presented.

C. definite shape, definite volume. that is a solid.