The answer is B, because if it says that "Martin luther king voice had a strong power over the audience" that obviously means he was speaking and a very dominant tone which means all eyes and ears where peered upon him.
True
In Sociology and other social sciences, informed consent
of participants in a research study is crucial. To be ethical, it is important
for participants to be made fully aware of the nature of the study, its
purpose, methodology and risks. Informed consent provides
participants with comprehensive and clear details on the study from which they make an informed and voluntary decision to participate in the study.
I uploaded the answer to a file hosting. Here's link:
tinyurl.com/wpazsebu
