What is true about most higher-grade metallic ores?(1 point)

Question

Responses

They are usually found deep below Earth’s surface—more than 1,000 ft underground.
They are usually found deep below Earth’s surface—more than 1,000 ft underground.

They are usually found very close to Earth’s surface—less than 1,000 ft underground.
They are usually found very close to Earth’s surface—less than 1,000 ft underground.

Most of them can be extracted using the placer method.
Most of them can be extracted using the placer method.

Most of them can be extracted without requiring drilling.
Most of them can be extracted without requiring drilling.

Answer 1

None of the above responses are always true about most higher-grade metallic ores. The location and extraction methods of metallic ores can vary greatly depending on the specific type and location of the ore deposit.