Of these choices, what display type would a DMM probably use?

A Digital Multimeter (DMM) typically uses an LCD (Liquid Crystal Display) for its display. LCDs are favored in DMMs for several reasons, including their low power consumption, lightweight nature, and ability to produce clear, easily readable numbers in a variety of lighting conditions. These characteristics make LCDs particularly well-suited for the battery-operated design of most DMMs, enhancing portability and usability in different environments.

LEDs (Light Emitting Diodes), while they might be used for indicator lights or in some specific display designs, are not typically used for the main display of a DMM due to their brightness and visibility limitations compared to LCDs. OLED (Organic Light Emitting Diode) displays are still less common in DMMs, mainly because of their higher cost and potential for burn-in, which is not an issue for LCD technology. CRT (Cathode Ray Tube) displays are now largely obsolete for handheld devices due to their size and weight, making them impractical for modern electronic measurement tools like DMMs.