**Core Concept**
The underlying principle being tested is the understanding of colorectal polyp pathology, specifically the classification and management of adenomatous polyps based on their histological characteristics and extent of invasion. **Adenomas** are benign tumors that have the potential to progress to colorectal cancer. The depth of invasion is crucial for determining the management approach.

**Why the Correct Answer is Right**
Since the adenoma extends up to the **muscularis mucosae**, it is considered a completely removed polyp if the removal margins are clear, and there's no high-grade dysplasia or cancer. The management would typically involve surveillance colonoscopy to monitor for new polyps or recurrence, rather than immediate surgical intervention.

**Why Each Wrong Option is Incorrect**
**Option A:** Incorrect because immediate surgery is not required for adenomas limited to the muscularis mucosae without high-grade dysplasia or invasive cancer.
**Option B:** Incorrect as it might not be necessary if the polyp is completely removed with clear margins.
**Option C:** Incorrect because the depth of invasion described does not necessitate such an approach.

**Clinical Pearl / High-Yield Fact**
It's crucial to understand the difference between **adenomatous polyps** that are limited to the mucosa or submucosa and those that invade deeper layers, as this distinction significantly impacts management decisions and prognosis.

**Correct Answer:** D. Surveillance colonoscopy.