**Core Concept**
The question requires knowledge of preventive measures against cervical cancer, specifically a contraceptive method that can also prevent this disease. Cervical cancer is primarily caused by the human papillomavirus (HPV), and certain contraceptive methods have been shown to have a protective effect against HPV infection and subsequent cervical cancer development.

**Why the Correct Answer is Right**
The correct answer is a type of contraceptive method that has been demonstrated to have anti-HPV properties. This method involves the use of a hormone, specifically progestin, which has been shown to reduce the risk of cervical cancer by inhibiting HPV replication and promoting immune system response against the virus. The hormone progestin works by binding to progesterone receptors in the cervix, which in turn modulates the immune response and reduces the expression of HPV genes.

**Why Each Wrong Option is Incorrect**
**Option A:** This option is incorrect because it does not have a proven mechanism of action against HPV or cervical cancer.
**Option B:** This option is incorrect because it is not a recognized contraceptive method for preventing cervical cancer.
**Option C:** This option is incorrect because it is a type of contraceptive method that may actually increase the risk of cervical cancer due to its association with increased HPV transmission.

**Clinical Pearl / High-Yield Fact**
HPV vaccination is the most effective method of preventing cervical cancer, but certain contraceptive methods, such as progestin-only pills, have been shown to have a protective effect against HPV infection and subsequent cervical cancer development.

**Correct Answer:** C. Progestin-only contraceptive methods, such as the progestin-only pill, have been associated with a reduced risk of cervical cancer due to their anti-HPV properties.