Name a common type of fiber optic connector.

The correct response identifies that all listed options—LC, ST, and SC—are indeed common types of fiber optic connectors.

The LC connector, or Lucent Connector, is widely used for its compact size and low-cost coupling mechanism, making it ideal for high-density applications. It features a latch mechanism, similar to RJ-45 connectors, allowing for easy connections and disconnections.

The ST connector, known as the Straight Tip connector, has a bayonet-style coupling mechanism which makes it easy to connect and disconnect. It is traditionally used in multimode fiber applications and is recognizable by its round design with a small ceramic ferrule that houses the fiber.

The SC connector, also referred to as the Subscriber Connector, utilizes a push-pull mechanism for ease of use and is popular in both singlemode and multimode fiber applications. It's known for its durability and efficient performance in high-density deployments.

Collectively, these connectors are foundational elements in fiber optic networks and are used extensively across various applications, reinforcing the understanding that all of them are indeed prevalent in the fiber optics industry.