WHAT IS THE MAIN IDEA OF THIS PASSAGE

Câu 16: What is the main idea of this passage? A. Searching for wrecks is much easier with new technologies like side-scan sonar. B. Maritime archaeologists are concerned about the unregulated searching of wrecks. C. The search of the RMS Republic failed to produce the hoped-for coins. D. The popularity of treasure seeking has spurred a debate between preservationists and salvagers.