Answer:
The correct answer would be D, Test the solution strength with the test strips.
Explanation:
Sanitizer is a solution which is used to kill germs, bacteria, fungi, viruses, etc. With the use of sanitizers, the infectious agents present on the hands, face, or any part of the body are killed or almost 99.9% removed from that part of the body. When this solution is made, it is first tested in the laboratories. There are test strips that are dipped in the solution and the strength of the solution is tested in this way. These strips are used to find out the strength of the solution formed. So option D is the appropriate one.
