What happens to the values of x and y in the second section of code? What is the purpose of the variable z in the second section of code?
a) x and y are incremented by 1; z is used as a placeholder
b) x and y are set to 0; z is used to store the result of x + y
c) x is set to y; y is set to x; z is used as a temporary variable
d) x is set to 5; y is set to 10; z is used to store the sum of x and y
