What effect might a high unemployment rate have on the wages of americans who still had jobs?

The wages of people who still have jobs would go down because a high unemployment rate means that there are more workers than needed, and accordingly, the price paid to the workers (the wages) reduces until reaching a new equilibrium that matches the labor needs of the firms.

The part of Mexico where most people live because of mild temperatures, fertile land, and rainfall is "Sierra Madre"

This is because the climate of Sierra Madre is characterized by mild temperatures, fertile land, and rainfall.

It has also been found to have plenty amount of forest which serves the people living around.

On the other hand, option B is wrong because Yucatan Peninsula is known not to be fertile.Option C is wrong because Copper Canyon is known for its rocky region which is not fertile.Option D is also wrong because Mexican Plateau is known to be a desert region.

Hence, in this case, the correct answer is option A "Sierra Madre"

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