Answer: Will remain silent on that issue
Explanation:
According to the theory of Spiral of science, member of the social group can be neglected, avoided ,excluded or isolated if the member propose his/her opinion. People usually don't tend to expression their views on social and controversial issues as they think it will not be considered by others and this usually discourages the members.
According to the question's situation, Marshall will decide to maintain silence and won't propose his opinion in accordance with Spiral of Silence theory. As recent poll's results in low votes towards Marshall's opinion. Thus, Marshall does not promotes his opinion because of low supporters and would might think his view might be avoided by others.
