Three of the Following Students Show Warning Signs of Being

Three of the following students show warning signs of being at risk.Which student is least likely to be at risk?

A) Annie never stays after school for extracurricular activities, and she seems to have no friends at school.
B) Brenda is so busy with student government, cheerleading, and varsity sports that her grades have gone from As to Cs and Ds.
C) Carolyn is fourteen years old and still in sixth grade, so she has little in common with her classmates.
D) Meagan has gotten low achievement test scores since elementary school.