The type of Optical Fiber that is used normally to connect two buildings that are apart by several kilometers is called the Single-Mode Optical Fiber.
<h3>
</h3><h3>
What is a Single-Mode Optical Fiber
</h3>
In the field of fiber optic communication, the single-mode optical fiber (SMF) which is also known as the fundamental or mono-mode optical fiber is one that is designed with the ability to carry and transport only a single mode of light.
Learn more about types of Optical Fibers in the link below:
brainly.com/question/8887427
The correct answer is letter D. The best way to handle a problem is to take care of the problem as soon as you notice it. This is a very good form of avoiding the conflict or the problem to get bigger and affect more than it's supposed to. People who know how to do this live happier and more contented lives.
