Answer:
A. there is correlation, but marriage is not necessarily the cause of higher income for married men
Step-by-step explanation:
When two facts are somewhat related to one another in any aspect, correlation is said to have been established.
Income of an individual would depend upon the amount of hours put in, the efficiency and productivity of an individual and other related factors.
Marriage of an individual has got nothing to do with income.
The statements provided in the question do establish a correlation as a statistical measure but apart from statistical relation, without evidence to substantiate the claim, marriage cannot be necessarily cited as the reason for higher income among married men.