Final answer:
The complete subject in the sentence is "The search for gold and silver".
Step-by-step explanation:
The complete subject in the sentence "The search for gold and silver attracted miners to California in 1849" is The search for gold and silver. The complete subject includes all the words that tell us who or what the sentence is about. In this case, "The search for gold and silver" is a noun phrase that functions as the subject of the sentence.
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