A. true b. false. when growing microbes, microbiologists work to perfect aseptic technique.

              The correct statement is a (true).

Explanation:
                     In order to grow microbes, first media must be prepared and autoclave to remove any contamination. Then inoculation is done under laminar flow hood which contain UV and filter that further prevent contamination. It means that each and every step should be followed by aseptic technique to prevent contamination in the desired microbial growth.

They must use the scientific method