There is no section C in this years exam. There are 50 multiple choice questions worth 50 marks in total, and then 70 marks worth of short answer questions. As far as I know, there will be at least one 10 marker question in section B, but this could be anywhere in the paper and not necessarily at the back. The 10 marker could be on anything, it doesn't have to be on a research study or experiment. It is also likely that there will be questions worth 6 or even 8 marks, like what was seen in this years sample exam.
Although there is no section C, it is likely research methods will still make up a huge part of the exam, so it is important to know them.
The written examination advice states the following;
"Section B will consist of short-answer and extended-answer questions, including questions with multiple parts. One of the extended-answer questions will be worth 10 marks and will not have multiple parts."
Also the criteria reads as follows;
"The extended-answer question in Section B that is worth 10 marks and that does not have multiple parts will be assessed against the following criteria:
identification and explanation of formal psychological terminology relevant to the question
use of appropriate psychology terminology
discussion of relevant psychological information, ideas, concepts, theories and/or models and
the connections between them
analysis and evaluation of data, methods and scientific models
drawing of evidence-based conclusions and explanation of limitations of conclusions".
Thus, its highly likely that the q will be mostly content and may ask for potential EV's or a conclusion.