Astudent is interested in studying college student success. his professor asked,‘how will you measure it? " the student replies, "with the grade point average atgraduation." this instance of specifying how college student success is to bemeasured is an example of
a. placebo effects.
b. descriptive identification.
c. hypothesis testing.
d. operational definitions

Operational definitions

Explanation:

An operational definition is the articulation of operationalization used in establishing the terms of a process needed to infer the nature of an item or phenomenon and its properties.

The student here is concerned about studying college student success and specifies the method of measurement as grade point average at graduation, hence grade point average at graduation defines the term needed to determine the nature of college student success.

answer; (d) one tectonic plate plunges beneath another; (most common,convergent boundaries)