Mia spent 30 minutes answering the math questions on the exam. This was 1/4 of the total amount of time allotted for this section of the exam. To determine the total amount of time allotted for this section of the exam, Mia set up and solved the equation as shown below.
x = 18
Which best describes the error that Mia made?
a. Mia did not use the correct equation to model the given information.
b. Mia should have multiplied both sides of the equation by 3.
c. The product of is not equal to 18.
d. The product of and should have been the value of x.