**Core Concept**
Angiofibroma is a benign but locally aggressive tumor that primarily affects adolescent males. It arises from the nasopharyngeal region and is characterized by its rich vascular supply and potential for significant bleeding.

**Why the Correct Answer is Right**
The most common initial presentation of angiofibroma is nasal obstruction, which is often accompanied by recurrent epistaxis (nosebleeds). The tumor's growth can lead to erosion of surrounding structures, such as the posterior wall of the maxillary sinus, the pterygopalatine fossa, and the sphenopalatine foramen. The key to diagnosing angiofibroma is identifying the characteristic imaging findings on CT or MRI, including a well-defined mass with extensive bony erosion and a rich vascular supply.

**Why Each Wrong Option is Incorrect**
**Option A:** This option is incorrect because angiofibroma is not typically associated with cervical lymphadenopathy (enlarged lymph nodes in the neck).
**Option B:** This option is incorrect because while angiofibroma can cause nasal obstruction, it is not typically associated with a history of chronic sinusitis.
**Option C:** This option is incorrect because angiofibroma is not typically associated with a history of trauma to the nasal cavity.

**Clinical Pearl / High-Yield Fact**
The classic age range for angiofibroma is between 10 and 20 years, with a peak incidence around 15-16 years. This knowledge can help guide the differential diagnosis in adolescent males presenting with nasal obstruction or recurrent epistaxis.

**Correct Answer: C. MRI.