The Story of the Search for the Mission Santa Catalina

The story of the search for the Mission Santa Catalina illustrates:

A) the utility of proton precession magnetometry for finding buried structures.
B) that soil resistivity survey, while sometimes useful, is extremely problematic as it is affected by soil wetness.
C) that ground-penetrating radar was not useful due to the shallowly-buried bedrock on St. Catherine's Island.
D) how a not-for-profit group does not sponsor a comprehensive program of research and conservation.