Why were some people against John Harrison claiming the prize for solving the problem of longitude?
A. Harrison failed to prove how his clock would solve the problem of longitude.
B. They thought ...
... his clock would not remain accurate once it was aboard a ship.
C. Someone else claimed that he had invented an accurate clock before Harrison did.
D. They wanted an astronomical solution and did not want the prize to go to a watchmaker.
The answer is C!
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