To solve this question, the user needs to know the basic syntax of Python and the behavior of the append() method.

The given code creates a list named numbers containing the integers 1, 2, 3, and 4. The append() method is then called on the numbers list, with the argument [5, 6, 7, 8]. This will add the entire list [5, 6, 7, 8] as a single element at the end of the numbers list.

So, after the append() operation, the numbers list will contain 5 elements: [1, 2, 3, 4, [5, 6, 7, 8]]. Finally, len(numbers) is called to get the length of the list, which is 5.

Therefore, the answer is:

The Answer is: B. 5

Explanation: Let's go through each line of code step by step:

1. for i in range(2): This will iterate over the values 0 and 1, because range(2) generates a sequence of numbers starting from 0 and ending at 2 (exclusive). Therefore, the output of this loop will be 0, 1.

2. print i This will print the value of i in each iteration of the loop. In this case, it will print 0 and 1 on separate lines.

3. for i in range(4, 6): This will iterate over the values 4 and 5, because range(4, 6) generates a sequence of numbers starting from 4 and ending at 6 (exclusive). Therefore, the output of this loop will be 4, 5.

4. print i This will print the value of i in each iteration of the loop. In this case, it will print 4 and 5 on separate lines.

Putting it all together, the final output will be:

0
1
4
5

Option C) 0, 1, 4, 5 is the correct answer because it matches the output of the code.