正解:C
Comprehensive and Detailed In-Depth Explanation:
Ultra HD (UHD), also referred to as 4K UHD, has a resolution of 3840x2160. It's four times the resolution of standard 1080p (Full HD), offering more screen real estate and sharper images.
* Option A (1920x1080): Full HD (FHD), not UHD.
* Option B (2048x1080): DCI 2K - used in cinema, not common for Ultra HD.
* Option D (7680x4320): Known as 8K UHD, not standard Ultra HD.
CompTIA A+ Core 1 Exam Objective Reference:
* Objective 1.7: Compare and contrast display technologies and their features.