In 2015, geologist Peter Rogerson calculated that the geographic center of Georgia was a point 17.7 miles southeast of the municipality of Macon. Rogerson’s calculation was more accurate than the one from 1920 by the US Geological Survey. ______ this earlier calculation was made using far more rudimentary equipment—only cardboard and string.
Which choice completes the text with the most logical transition?
Explanation
Context: The passage reports that Rogerson's 2015 calculation of Georgia's geographic center was more accurate than a 1920 US Geological Survey attempt, then notes the 1920 work used only cardboard and string.
Answer: A) Of course,
Why? The cardboard-and-string detail is the unsurprising reason the older figure was less accurate, so the blank must present it as an expected concession rather than a new turn.
Traps:
- B) "Ultimately," points to a final outcome, but the crude equipment came first and explains the earlier attempt instead of concluding the account.
- C) "Likewise," claims similarity, and rudimentary tools stand opposite the more accurate modern calculation rather than matching it.
- D) "To that end," introduces the means to a stated goal, and no goal is named for which cardboard and string would be the method.