**Core Concept**
The Mini Mental Status Examination (MMSE) is a widely used, standardized tool for assessing cognitive function in patients with suspected dementia, delirium, or other cognitive impairments. It evaluates various cognitive domains, including orientation, attention, memory, language, and visuospatial skills.

**Why the Correct Answer is Right**
The MMSE score ranges from 0 to 30, with higher scores indicating better cognitive function. The total score is calculated by summing the points obtained from each of the 11 items in the examination. The correct answer is the maximum possible score that a patient can achieve, reflecting optimal cognitive function in all assessed domains.

**Why Each Wrong Option is Incorrect**
**Option A:** 15 - This is incorrect because the MMSE score is not halved. This option may be chosen by students who misunderstand the scoring system or are unfamiliar with the MMSE.

**Option B:** 45 - This is incorrect because the MMSE score does not exceed 30. This option may be chosen by students who overestimate the maximum possible score.

**Option C:** 60 - This is incorrect because the MMSE score is not tripled. This option may be chosen by students who are unfamiliar with the MMSE or make a mathematical error.

**Clinical Pearl / High-Yield Fact**
The MMSE is a quick and useful tool for screening cognitive impairment, but it has limitations, such as cultural bias and variability in scoring. Clinicians should use the MMSE in conjunction with other diagnostic tools and clinical judgment to accurately assess patients' cognitive function.

**Correct Answer: D. 30**