Refer to the following array:let arr = [1, 2, 3, 4, 5];Which two lines of...

The correct answers are C and D .

Arrays in JavaScript are objects. When an array variable is assigned directly to another variable, both variables point to the same array in memory.

Option C is correct:

let arr2 = arr;

This does not create a new array. It creates another reference to the same array.

Example:

arr2.push(6);

console.log(arr);

Output:

[1, 2, 3, 4, 5, 6]

Changing arr2 also affects arr because both variables reference the same array.

Option D is also correct:

let arr2 = arr.sort();

The sort() method sorts the array in place and returns the same array reference. Therefore, arr2 refers to the same array object as arr.

The incorrect options create copies:

let arr2 = arr.slice(0, 5);

creates a shallow copy.

let arr2 = Array.from(arr);

also creates a new shallow copy.

So the two lines that make arr2 reference the original arr are C and D .