Kai is swinging on a trapeze in a circus show. The horizontal distance between Kai and the edge of the stage, in meters, is modeled by $D(t)$ where $t$ is the time in seconds. The function is graphed below, along with one segment highlighted, a red double arrow from (5,21) to (15,21). What is the meaning of the highlighted segment?
Choices:
A:Kai completes 10 swing cycles per second.
B:The trapeze is hung $\mathbf{1 0}$ meters from the edge of the stage.
C:Kai completes a single swing cycle in 10 seconds.
D:The trapeze is $\mathbf{1 0}$ meters long.
Please directly answer the question and provide the correct option letter, e.g., A, B, C, D.
Question: Kai is swinging on a trapeze in a circus show. The horizontal distance between Kai and the edge of the stage, in meters, is modeled by $D(t)$ where $t$ is the time in seconds. The function is graphed below, along with one segment highlighted, a red double arrow from (5,21) to (15,21). What is the meaning of the highlighted segment?
Choices:
A:Kai completes 10 swing cycles per second.
B:The trapeze is hung $\mathbf{1 0}$ meters from the edge of the stage.
C:Kai completes a single swing cycle in 10 seconds.
D:The trapeze is $\mathbf{1 0}$ meters long.
Please first conduct reasoning, and then answer the question and provide the correct option letter, e.g., A, B, C, D, at the end.
Question: Kai is swinging on a trapeze in a circus show. The horizontal distance between Kai and the edge of the stage, in meters, is modeled by $D(t)$ where $t$ is the time in seconds. The function is graphed below, along with one segment highlighted, a red double arrow from (5,21) to (15,21). What is the meaning of the highlighted segment?
Choices:
A:Kai completes 10 swing cycles per second.
B:The trapeze is hung $\mathbf{1 0}$ meters from the edge of the stage.
C:Kai completes a single swing cycle in 10 seconds.
D:The trapeze is $\mathbf{1 0}$ meters long.