Nancy has been studying microbiology as a part of her cosmetology course. What knowledge would she gain? OA.
how to prevent transmission of infection
OB.
how to use the right strokes in a facial
OC.
how to inject vitamins
OD
how the personal care products are absorbed in the skin
OE.
how correct body mechanics can help during a procedure

A.  how to prevent transmission of infection

Explanation:

Microbiology deals with understanding microorganisms such as bacteria, viruses, fungi and others. Some of these microorganisms are the cause of infections when they come in contact with other living things.

In studying microbiology as part of cosmetology, Nancy will most probably gain knowledge on how to prevent transmission of these microorganisms that cause infection.

the first successful, urban blues recording, selling more than 75,000 copies, was made in year 1920.

mamie smith recorded the first commercially successful example of the urban blues,   with the recording of “crazy blues”."crazy blues" was recorded on august 10, 1920, in new york city. within a month of the release of “crazy blues” it had sold 75,000 copies.