To find the new coordinates of the endpoints after a 90° clockwise rotation, we can use the transformation rules for rotation in the Cartesian plane. For a point \((x, y)\), a 90° clockwise rotation results in the coordinates \((y, -x)\).
Let's start with the first endpoint of the line segment which is \((0, -3)\):
- Applying the rotation: \[ (0, -3) \rightarrow (-3, 0) \]
Now, let's do the same for the second endpoint of the line segment which is \((0, -7)\):
- Applying the rotation: \[ (0, -7) \rightarrow (-7, 0) \]
Based on these calculations, the new endpoints after a 90° clockwise rotation are \((-3, 0)\) and \((-7, 0)\).
From the provided options, the endpoint \((-3, 0)\) matches one of our results.
Thus, the answer is: \[ \text{(−3, 0)} \]