GRE General Test: TC-762930 GRE Text Completion

At first, the collector was (i) _____of the woman’s claims that the gold bar was sunken treasure. After he (ii) _____it, though, he found that coral had grown on the back of the bar, indicating that the bar had been underwater for years. This discovery (iii) _____the woman’s claim.
Blank (i)
Blank (ii)
Blank (iii)