Consider the following research question.

research question: why are pickles stored in salt water?
which hypothesis is based on this research question?
a. pickles are green because that is a popular color.
b. it is well-documented that pickles are fun to eat.
c. pickles are stored in salt water to prevent them from spoiling.
d. a grocery store will sell more pickles when the pickle jars are shelved at eye level than when they are shelved near the floor.