The way I solved is by trying to understand the meaning of the sentence
After carefully reviewing the results? Who reviewed the results? was it Zeigarnik or was it her findings? I went with Zeigarnik so D and E we say goodbye.
looking at A, B, and C the split is in the last part of the answer choices. the sentence "that people better remember tasks that have not yet been completed compared to ones that have been" is a modifier and modifies " Her Finding". We can read the entire sentence without the modifier to see if it makes more sense.
Zeigarnik ascribed her finding
, that people better remember tasks that have not yet been completed compared to ones that have been, to be the product of the tendency
now Ascribed = regard something as being due to (a cause).
A and B seem to be redundant
C is concise to the point. I was honestly in a fix myself so would like an experts opinion on this.
After carefully reviewing the results, Zeigarnik ascribed her finding, that people better remember tasks that have not yet been completed compared to ones that have been, to be the product of the tendency of the mind to want to complete a task in order to move on, and to be willing to work harder to do so.
A) Zeigarnik ascribed her finding, that people better remember tasks that have not yet been completed compared to ones that have been, to be the product of the tendency
B) Zeigarnik ascribed her finding, that people better remember tasks that have not yet been completed compared to ones that have been, to be from the tendency
C) Zeigarnik ascribed her finding, that people better remember tasks that have not yet been completed compared to ones that have been, to the tendencyD) Zeigarnik's finding, that people better remember tasks that have not yet been completed compared to ones that have been, was ascribed to have been the product of the tendency
E) Zeigarnik's finding, that people better remember tasks that have not yet been completed compared to ones that have been, to the tendency
IMO C