Jill Jacobs Receives a Grade Equivalent Score of 10

Jill Jacobs receives a grade equivalent score of 10.6 on a national reading test. She is in the ninth grade. Which statement is most true about Jill?

A) Her reading ability is equal to students at the 10^th grade level.
B) Based on this score, no conclusions can be drawn.
C) Jill is doing better than the average student in her grade level.
D) Jill is doing worse than the average student in her grade level.
E) None of these are true.