What are Connectors in the Flow Builder?

What are Connectors in the Flow Builder?
A . Are containers that hold data values. Like variables.
B . It is the start element which can in some flows be programed to regulate when the Flow should trigger.
C . They Define the behaviour of the flow, they are the building bocks for defining various actions.
D . Are the paths defined between the various elements that represent the order of execution.

Answer: D