In lines 9-11, what is the effect on the speaker repeating the phrase "forty-five minute(s)" when describing the drive to and from physical therapy?

A. It reveals that the speaker was an observant
child.

B. It illustrates how slowly the speaker's mother
had to drive.

C. It shows how hard it was for the family to find
good medical care.

D. It emphasizes how long and routine the drives became for the family.