Is anyone an expert in geometry that me with this math its past dues but i would like to have some on this ! i would like someone to me on this, on how to solve it correctly. every time i try to do it it ends up wrong. someon walk me through this and so i can at least make a b or aon it.

Agroup of student volunteers participates in a study designed to assess several behavioral interventions for improving output in a repetitive task. prior to the beginning of the study, all volunteers unknowingly observed, and their output is measured. at the beginning of the study, prior to any intervention, the volunteers perform the same task under the observation of a study administrator, and their overall output increases. which of the following terms describes this phenomenon? a. simpson's paradox b. hawthorne effect are d. novelty effect d. pygmalion effect e. observer-expectancy effect