Which of the following is the linear parent function

Option: C is the correct answer.
C.) F(x)= x
We know that a linear parent function is a function whose graph is a straight line passing through the origin and the equation of such a function is given by:
y=F(x)=x
Since, it is the simplest form of the equation of all the linear functions that are known to us and hence known as the parent linear function.