Which of the following statements is false?

a) Extension methods add functionality to a type by modifying the type’s source code.
b) LINQ capabilities are implemented as extension methods.
c) Preceding an object parameter that’s the first parameter in the method header with the
this keyword indicates that the method extends an existing type. The compiler uses this
information to add code into the compiled program that enables extension methods to
work with existing types.
d) The type of an extension method’s first parameter specifies the type that you’re
extending.

a) Extension methods add functionality to a type by modifying the type’s source code.