Line 1 defines a list and line 3 defines a string.

They both define different constants.

They define different functions.

Line 1 defines a list and line 3 defines a function.

They define different lists.

Add (require racket/trace) anywhere before (trace fib). (trace fib) MUST be added before the function call but after the fib function definition.

(require racket/trace) MUST be added as the first line of code. (trace fib) MUST be added before the function call but after the fib function definition.

(require racket/trace) MUST be added before defining the function and (trace fib) MUST be added after defining the function.

Add (trace fib) as the first line of code.

Add (start trace) before the definition and (end trace) following the definition.

Line 1 is the base case and Line 2 is the recursive call.

Line 3 is the base case and Line 1 is the recursive call.

Line 2 is the base case and Line 3 is the recursive call.

Line 3 is the base case and Line 2 is the recursive call.

Line 2 is the base case and Line 1 is the recursive call.

Revise Edit Produce Last.

Read Evaluate Print Loop.

Read Every Product List.

Reassign Each Predicate Locally.

Reproduce Everything Proceeding Left.

The first will cause a syntax error and the second will print out a list. 

The first will print out a list and the second will cause an error.

The first will print: 1 2 3 4 5, and the second will print: (1 2 3 4 5).

The first will print: (1 2 3 4 5), and the second will print: ((1 2 3 4 5)).

     None of the other answers.

  (46)

  (10 5 8 3 10 10)

  (3 10)

  (15 11 20)

  (10 8 10 5 3 10)