|Question 23Verbal

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Scientists studying asteroid deflection have focused on secondary objects such as S/2015 (190208), a moonlet orbiting the near-Earth asteroid 2006 AQ. In 2022 NASA intentionally crashed a probe into just such an object, successfully altering its orbit. Scientists have yet to demonstrate, ______blank that 2006 AQ and other primary objects would be similarly affected.
Which choice completes the text with the most logical transition?
for example,
A
admittedly,
B
moreover,
C
likewise,
D