Recall that in a field experiment described in the text, participants were more likely to properly dispose of a handbill left on their windshields when they saw a confederate pick up and dispose of a fast food bag. The researchers suggest that the role of the confederate in this study was to:.
a. let participants know what the descriptive norm was.
b. let participants know what the injunctive norm was.
c. make the norms salient to participants.
d. provide an audience to increase self-awareness.

c. make the norms salient to participants.                                  

Explanation:

Field experiment: In psychological research, the term "field experiment" is described as one of the different studies that utilize "experimental design" that happens in any natural setting. While conducting a field experiment, the experimenter tends to examine or analyze the degree to which the manipulation of a single independent variable causes a change or alteration in the given dependent variable related to the natural environment.

In the question above, the researchers suggest that the specific role of the given confederate in the mentioned study was to make the particular norms salient to participants as it is significantly described that participants will model the confederate's behavior i.e, they will get influenced.

every society, in order to meet the needs of it's people, has to answer three basic questions:

- what should we produce?

- how should we produce it?

- for whom should we produce it?

this questions must be answered in order to, option b, aid in production decisions.

every country can't produce everything, no matter how rich their land is. it may be a matter of technology, resources or geographical conditions. so, these three questions must be resolved in order to get the most of the production of each land.

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modern american cars are not available due to trade restrictions