A laboratory study compared learning from text in two conditions, one with underlining of important terms and one without underlining, found that the underlining group did better on factual items. Marina then conducted a studywith tenth-grade history students and compared one group that read a chapter with the important text underlined and one group that read a chapter without any underlining. Marina's study illustrates an example: a. test for reliability.
b. internal validity study.
c. replication study.
d. regression study.

c. replication study.

Explanation:

Replication study: In research, the term "replication study" is denoting the repetition of a particular research study mainly with distinct participants and distinct situations, in order to describe if the primary findings of the "original study or research" can be implemented in other circumstances and participants.

Types:

Literal replication.

Construct replication.

In the question above, the given statement represents "replication study".

by using  production possibilities graph.  opportunity costs are key expenses in financial matters and are utilized as a part of registering money saving advantage investigation of a venture. such expenses, be that as it may, are not recorded in the record books but rather are perceived in basic leadership by processing the money costs and their subsequent benefit or misfortune.