Need

which line from the text best summarizes mrs. t.'s lesson to jilly?

a."well that is not the lesson i was thinking of," mrs. t. said.
b."you did learn many lessons, jilly. you knew so much when you started."
c."you've gone farther than any other assistants i've had. i will miss you."
d."that you will learn as much about yourself as you do about growing plants."