"MCAT" Operational definitions are ways to measure and define a construct. A construct is variable that cannot be seen or touched. Answer A is incorrect because, while a ratio scale could be used to obtain measurements, the construct must still be operationally defined first. Choice B is incorrect because correlational research is designed to show a relationship that exists among previously-defined variables.

Operational definitions are ways to measure and define a construct.  

Explanation:

Operational definitions define a measurement procedure for external measuring and observable behavior. The results can be used to define a construct.

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the correct answer is :

{b.}   ( american workers lose job opportunities )

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    -sprinkles

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