Why was Melchior Diaz concerned about the expedition?
~Coronado's expedition, EDGE2020!~

Melchior Diaz concerned about the expedition is explained below in details.

Explanation:

Melchor Díaz was the first Spanish pioneer of western North America who "was a tough worker and experienced organizer and general. Melchior Diaz was a pioneer for the viceroy. Diaz obeyed the same track as de Niza and did not locate any towns of gold and, in fact, did not discover any evidence that the Indians practiced metals at all.

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explanation:

a trial judge has broad powers in his courtroom. the judge's decision is usually final for the duration of the trial, and the party's one special type of witness is an expert witness.