Select the sentence that best summarizes the output of the Python code below.
arr = [5, 10, 15]
for i, j in enumerate(arr):
    arr[i] = j*2
The code doubles the values of the elements in the `arr` list.
Complete the following task based on the instruction and optional input provided.### Instruction:
Select the sentence that best summarizes the output of the Python code below.

### Input:
arr = [5, 10, 15]
for i, j in enumerate(arr):
    arr[i] = j*2

### Output:
The code doubles the values of the elements in the `arr` list.