A is the best answer. Hope that helped! If you don't understand why PM me and i can try to explain :)
Answer:
The positive control is an experiment that involves the repetition of the testusing working treatment. ... This helps the analyst compare the result to a new experiment against an already results that are already known. Negative controls are always used during microbiology testing.
Answer:
there is no right or wrong answer the teacher is wanting your opinion.
Explanation:
True or false? The answer is true
