The answer is: D. Knowledge is present in an individual from birth.
According john Locke, the only way people acquire new knowledge is by conducting various observations to the things that happened around us.
The process of learning occurs throughout our life. As we possess more experience, the more knowledge that we will have on our disposal.
Because of this, John Locke would not believe in an idea that state knowledge is already acquired since birth without having to make any efforts.