Why Do Astronomers Require Measurements from at Least Three Gravitational

Why do astronomers require measurements from at least three gravitational wave detectors to identify the source of a gravitational radiation signal?

A) Gravitational waves have a wavelength of about a thousand kilometers, requiring detections across large distances.
B) Gravitational waves are so weak that several detectors are required to confirm a signal.
C) Three detections are required to separate real gravitational waves from locally generated noise.
D) The time delay between the different detectors allows astronomers to identify the direction of the source.

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