Why did spanish leaders want to push spanish control into north america in the mid 1500s

Spanish leaders wanted to push Spanish control into North America in the mid-1500s because North America had a lot of Gold and Silver. Mines were established to mine for gold and silver, and by the late 16th century, silver mined from North America accounted for one-fifth of Spain's total budget.

I’m pretty sure that the answer is b.

Ais the correct answer