To ensure that you get the right concentration of sanitizing solution:

a. do your best to estimate it correctly
b. follow the label instructions and use a test strip
c. immerse items for at least 30 seconds
d. consistently use 100 ppm for any sanitizing solution

To ensure that you get the right concentration of sanitizing solution, follow the label instructions and use a test strip. The correct option among all the options that are given in the question is the second option or option "b". I hope that this is the answer that has come to your desired help.

Hahaha good one. you ? & oop