Answer:
the first choice
Explanation:
The reason why it is the first choice is because you would need to experiment twice before concluding your experiment one has to be normal height and the second test has to be higher also the mass on the car also is a factor to the experiment.
The answer is B I just took the test!
cadmium (Cd) : transition metal
vanadium (V) : transition metal
xenon (Xe) : noble gas
iodine (I) : halogen
potassium (K) : alkali metal
strontium (Sr) : alkaline earth metal
yeahhhh
