Answer:
B. retracted due to a financial conflict of interest by the author
Explanation:
The name of the author related to that research is Andrew Wakerfield.
He is a British Surgeon who is working together with another company to develop a certain type of drug which he promise will prevent autism among children.
Manipulating research to make it look like there is a link between childhood vaccines and autism was made as an elaborate shceme to make parents choose to buy his drug instead.
