Part of the reason for Scott’s acne is the overproduction of sebum. Scott’s initial instinct is that shutting down production of sebum would be the quickest route to eliminating his acne; however, sebum actually plays an important role in maintaining the skin as a first line of defense against pathogens. Which of the following best describes the role of sebum as a component of the first line of defense?Select all that apply. A. Sebum helps to keep the pH of the skin low, which inhibits the growth of microorganisms. B Sebum forms a protective layer over the skin. C Sebum contains enzymes that inhibit the growth of pathogens. D Sebum creates an anaerobic environment, thereby preventing the growth of pathogenic organisms.