Vera has hyperopia, and tends to get headaches when she reads. This is because:
a. Vera is 5-years-old, and has just learned to read.
b. Vera is 80-years-old, and also has presbyopia.
c. Vera is 17-years-old, and has attention problems.
d. Vera is 25-years-old, and has just had LASIK surgery.