Based on the Following Abstract Taken from the Journal Trends

based on the following abstract taken from the journal Trends in Neuroscience and Education (citation below) . The authors of the paper examined two different methods of mathematics instruction and used brain-imaging techniques to demonstrate how the methods might influence learning. Instructors are advised to use the reference below to retrieve the original abstract for their use.
Wirebring, L. K., Lithner, J., Jonsson, B. , Liljekvist, Y., Norqvist, M., & Nyberg, L. (2015) . Learning mathematics without a suggested solution method: Durable effects on performance and brain activity. Trends in Neuroscience and Education, 4(1) , 6-14.
-What information cannot be obtained by the methods of the study?

A) How quickly the angular gyrus increases its activation while the participant is solving a test question.
B) How strongly the fronto-parietal network is activated during the test phase across conditions.
C) How other brain regions differ from each other in terms of activation.
D) How strongly other brain regions are activated during test phase.