What would be a harmful side effect of a cold medicine?
a. you have chills throughout the night.
b. your nagging cough goes away.
c. your runny nose has dried up.
d. you break out in itchy hives.

What makes the yardstick test a direct measurement of reaction time? a. the further the yardstick falls, the slower the reaction time. b. yardsticks have numerical markings for length. c. yardsticks are designed to measure reaction time. d. all of the above select the best answer from the choices provided.