Ritical Evaluation of McGuire and Botvinicks Study

Critically evaluate the study by McGuire and Botvinick Prefrontal cortex, cognitive control, and the registration of decision costsfocusing on the method that was used and the limitations and implications of the study. (Study cited below, and an attachment may be supplied)
Evaluate the article in the light of 3 other articles (cited below as well) mentioning how the study may be made better using the methods of other studies mentioned.
The overall evaluation should tackle:
What the article is about
What is done
Method used (focusing on this part with technical terms and focusing on the methodology, participants, ethics, and procedure)
Results yielded (select results to tackle, mentioning contradictory results with other studies if any, this is also tackled in the discussion section)
Discussion in light of other 3 studies
Limitations and shortcomings and how they can be avoided (using the 3 sources)

CITATION OF MAIN STUDY:
McGuire, J. T., & Botvinick, M. M. (2010). Prefrontal cortex, cognitive control, and the registration of decision costs. Proceedings of the National Academy of Sciences, 107(17), 7922-7926.

CITATION OF 3 SOURCES:
Kool, W., McGuire, J. T., Rosen, Z. B., & Botvinick, M. M. (2010). Decision making and the avoidance of cognitive demand. Journal Of Experimental Psychology: General, 139(4), 665-682. doi:10.1037/a0020198
Basten, U., Biele, G., Heekeren, H. R., & Fiebach, C. J. (2010). How the brain integrates costs and benefits during decision making. Proceedings of the National Academy of Sciences, 107(50), 21767-21772.
Tzovara, A., Murray, M. M., Bourdaud, N., Chavarriaga, R., MillA?n, J. D. R., & De Lucia, M. (2012). The timing of exploratory decision-making revealed by single-trial topographic EEGanalyses. Neuroimage, 60(4), 1959-1969.