When the task of correctly identifying an individual in a slide of a four-person line up was both difficult and important, participants in an experiment were especially likely to conform to others' wrong answers. This best illustrates the impact of:.
a. the fundamental attribution error.
b. informational social influence.
c. normative social influence.
d. the mere exposure effect.

b. informational social influence

Explanation:

Informational social influence is a psychological or social phenomenon that describes the tendency of an individual to accept the information of others we consider accurate and correct most especially when faced with ambiguity or obscurity. We simply conform to the opinions of others we believe have an accurate information we seem not to have. In such situation, we simply conform to what they are doing because we believe they are right.

When participants in an experiment conform to others' answers as explained in the scenario given in the question, we can infer that it best illustrates the impact of informational social influence rather than influence from peers.

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a photo collage of women at work during world war 2