<span>B. occur when a patient doesn't produce enough leukocytes.</span>
Answer:
these disorders have a psychological rather than a physical cause.
Explanation:
A printable Snellen Chart, which you can download online.
Something to cover one eye at a time, like an eye patch or a paper cup.
Scissors.
Tape or tack to hang the chart on your wall.
Pencil or pen to record your results.
