The answer to the given question about “How many ducks does it take to screw in a light bulb?” is letter C or Your Mom. Before we delve into the answer a bit deeper, it is worthy to note that “How many ____ does it take to _____” is a series of different jokes that warrant different answers. In this question, however, the correct answer would be letter C.
The explanation to this question is because your mom knows how to screw in a lightbulb and she might also be the one who knows how to help these ducks to screw in that specific lightbulb. Other questions would say how many software engineers does it take to screw in a lightbulb and how many monkeys does it take to screw in a lightbulb.