Question

when blotting the slide after rinsing, you should:
rub the smear gently
use a paper towel to wipe off all stain
shake the slide to dry
blot carefully with absorbent paper

Explanation:

When blotting a slide after rinsing, the correct method is to use absorbent paper carefully. Rubbing the smear can damage it. Wiping off all stain with a paper towel is incorrect as it may remove too much. Shaking the slide to dry is not a proper blotting technique. Blotting carefully with absorbent paper helps remove excess liquid without harming the smear or removing too much stain.

Answer:

Blot carefully with absorbent paper.