What property of optical fibers contributes to better light transmission efficiency?

The property of optical fibers that contributes to better light transmission efficiency encompasses several factors, and the choice indicating "All of the above" captures this complexity effectively.

The length of the fiber plays a role because, as the length increases, there can be greater attenuation, leading to a loss in signal strength. Shorter fibers typically allow for more efficient transmission due to reduced losses.

The core material quality is crucial as it affects how well light is guided through the fiber. High-quality materials can minimize scattering and absorption losses, which significantly enhances light transmission efficiency.

Higher numerical aperture (NA) is also vital as it defines the light-gathering capability of the fiber. A higher NA allows more light to be accepted into the core, which improves the amount of light transmitted through the fiber.

Each of these factors—length, core material quality, and numerical aperture—contributes to overall efficiency in different ways, making it clear why the best answer encompasses all of them.