Which of the following is not a characteristic of chemotherapy agents?

Chemotherapy agents primarily work by targeting rapidly dividing cells, a hallmark of cancer. However, they do not exclusively target cancer cells; they can also affect healthy cells that reproduce quickly, such as those in the bone marrow, gastrointestinal tract, and hair follicles. This broad action results in collateral damage to healthy cells, which is often responsible for the side effects associated with chemotherapy.

The other characteristics of chemotherapy agents are well-established. Administering chemotherapy in cycles allows for the effective targeting of cancer cells while providing time for healthy cells to recover between doses. Moreover, many chemotherapy agents are designed to be effective against various types of cancers, making them valuable in a wide range of treatment protocols. Thus, option A accurately identifies a misconception about chemotherapy agents as it implies they selectively target only cancer cells, which is not the case.