Complete Each Sentence with "Increases," "Decreases," "Doesn't Change," or "Can't

Complete each sentence with "increases," "decreases," "doesn't change," or "can't say anything definite," as appropriate.
A) As the semester goes on, the number of days until final exams _____.
B) As a person's peanut butter consumption increases, her miles traveled to work _____.
C) As the speed of a car increases, the stopping distance of the car _____.
D) As the number of calculations increases, the probability of an error _____.