Which of the Following Statements About Scoping in Scheme Is

Multiple Choice

Which of the following statements about scoping in Scheme is correct?

A) A bound variable is a variable referenced within a function that is not also a formal parameter to that function.
B) A free variable is a variable within a function that is also a formal parameter to that function.
C) A free variable is a variable referenced within a function that is not also a formal parameter to that function.
D) A free variable is one that is bound within a nested function.