Rare Earth Elements Are Not Actually ____,But They Are Difficult

question 1

Multiple Choice

Rare earth elements are not actually ____,but they are difficult to find in high enough concentrations and process at an economically viable price.​

• A) ​economic
• B) ​rare
• C) ​mineable
• D) ​sustainable
• E) ​recoverable

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Definitions:

Abstract Qualities

Traits or characteristics that are not tangible or concrete, often relating to concepts, ideas, or values.

Construct Validity

Consistency between a high score on a test and high level of a construct such as intelligence or leadership ability, as well as between mastery of this construct and successful performance of the job.

Criterion-related

Pertains to a method of evaluating the validity of a test by comparing its results with an external criterion.

Contexts

The circumstances or environments in which events occur, affecting their understanding and interpretation.