Final answer:
A characteristic of oily skin is follicles that are moderate to large due to the increased production of sebum by sebaceous glands, which can make follicles appear larger and sometimes lead to acne.
Step-by-step explanation:
A characteristic of oily skin is A. Follicles that are moderate to large. This is because oily skin is often associated with an increased production of sebum, the oily substance secreted by sebaceous glands. Sebaceous glands are found contiguous with the hair follicles and are responsible for keeping the skin and hair moisturized.
In oily skin, the abundance of sebum can make the follicles appear more prominent or larger in size. This is also why people with oily skin may be more prone to conditions like acne, as excessive sebum, along with dead skin cells, can clog the pores.