The null hypothesis suggest in this situation would be "There is no difference between men and women in their opinions about marriage"
Answer: Option C
Explanation:
In the arena of science hypothesis, testing is an effecting method of finding whether there exists a relationship between two or more variables or not. Null hypothesis is referred to a default position or a general statement that there exists no relationship or connection between the given variables.
Then, this hypothesis is tested and ultimately upon the result of the tests conducted a conclusion is drawn either approving the null hypothesis or rejecting it.
In the given situation, where researcher has given her prediction that women would be holding different opinion about marriage then men, the null hypothesis could be formulated as there is no variation between the opinion of men and women about marriage.