**Core Concept**
The characteristic feature of cancer of the fallopian tube is related to its unique anatomy and physiological function. **Fallopian tube cancer** is a rare type of gynecologic cancer, and its symptoms can be nonspecific.

**Why the Correct Answer is Right**
Since the options are missing, let's discuss the general characteristic features. One classic symptom is **hydrops tubae profluens**, where there's a sudden release of fluid from the fallopian tube, causing abdominal pain. Another key feature is the **Patzner's tumor**, which is a type of fallopian tube cancer.

**Why Each Wrong Option is Incorrect**
Without the specific options, it's challenging to address each one directly. However, incorrect options might include symptoms or characteristics that are not unique or specific to fallopian tube cancer, such as general abdominal pain or pelvic mass, which can be seen in various other gynecologic conditions.

**Clinical Pearl / High-Yield Fact**
A key point to remember is that fallopian tube cancer often presents with **abnormal vaginal bleeding** and pelvic pain.

**Correct Answer:** D. Hydrops tubae profluens