|Question 21Verbal

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Australia ratified the Outer Space Treaty, an international agreement with over 100 signing nations tirat acts as the foundation for the laws of space, on January 27, 1967. Colombia signed the treaty; [blank] it has yet to officially ratify it.
Which choice completes the text with the most logical transition?
however,
A
similarly,
B
specifically,
C
for example,
D