**Core Concept**
Kaposi's sarcoma, non-Hodgkin lymphoma, and invasive cervical cancer are all AIDS-defining malignancies. These tumors are directly associated with the immunocompromised state caused by HIV infection. However, other tumors may be more prevalent in the general population but have a lower incidence in AIDS patients.

**Why the Correct Answer is Right**
Kaposi's sarcoma, non-Hodgkin lymphoma, and invasive cervical cancer are all strongly linked to HIV infection due to the compromised immune system. These cancers are more aggressive and occur at a younger age in AIDS patients. The other option listed (carcinoma of the anal canal) is not as strongly associated with AIDS and is more commonly seen in the general population.

**Why Each Wrong Option is Incorrect**
**Option A:** Kaposi's sarcoma is a classic AIDS-defining malignancy, making this option incorrect.
**Option B:** Non-Hodgkin lymphoma is another tumor type commonly seen in AIDS patients, so this option is also incorrect.
**Option C:** Invasive cervical cancer is associated with human papillomavirus (HPV) infection and is more prevalent in immunocompromised individuals, including those with AIDS, making this option incorrect.

**Clinical Pearl / High-Yield Fact**
AIDS patients are at higher risk for various types of cancer due to their compromised immune system. It's essential to consider the patient's immunocompromised status when evaluating malignancies.

**Correct Answer:** C. Carcinoma of the anal canal.