Nhận biết (M1)

In 2016, Gabriela González and team announced that a chirping sound captured by Laser Interferometer Gravitational-Wave Observatory antennas was direct evidence of gravitational waves, which skeptics had argued would be too faint for detection. Detailed statistical analysis helped preclude claims of the event’s __________ confirming the signal at a confidence level of over 99%.

Which choice completes the text with the most logical and precise word or phrase?

• A.

  discretion

• B.

  ambiguity

• C.

  probability

• D.

  inconspicuousness