The ancient mariners who first crossed the Pacific in outrigger canoes relied on detailed knowledge of stars, currents, and bird flight paths. ______ , their navigators could memorize the position and behavior of more than two hundred reference stars over a single voyage.
Which choice completes the text with the most logical transition?
- Acheck_circle
For instance
- B
However
- C
Therefore
- D
On the other hand
Explanation
The second sentence offers a concrete example of the knowledge mentioned. "For instance" signals example. The others do not.