A science class investigated the relationship between the amount of time
students spend doing chores every night and their average grades on
schoolwork. Which statement from the lab report best represents a
conclusion?
A. Based on our results, students who do 1 hour of chores per night
have grades that are on average 0.2 points higher than students
who do no chores.
B. Doing chores at night actually helps students do better at school,
even if it seems like the opposite would be true.
C. We believe that students should spend at least 2 hours doing
chores every night if they want to get better grades at school and
help their families.
O D. If students spend at least 1 hour per night on chores, then they are
guaranteed to get higher grades on their schoolwork.