This is a test of commonsense with single/multi-choices. Complete the next sentence:

How to treat scalp pimples
Use benzoyl peroxide.
Benzoyl peroxide is a common ingredient in acne washes and lotions. It works by killing bacteria that may otherwise clog pores to form new pimples.

Options:
A). It can be found at many pharmacies. It's an attractive, creamy product that also combines with other lotions.;
B). It also helps clear away excess oil and dead skin cells from the affected area. Benzoyl peroxide is usually found in strengths varying between 2.5 percent to 10 percent in over-the-counter products.;
C). As a way to get rid of scalp pimples, apply this treatment at least twice a day. A full day will provide less relief than a day without the benzoyl peroxide treatment.;
D). Benzoyl peroxide is available over-the-counter by prescription, and will stop the production of acne bacteria-possibly for a period of time. The goal of using benzoyl peroxide is to get rid of unwanted bacteria in your scalp, so do not take it on a regular basis.;
The answer is:
B).