Which two tests are the most accurate for this array?

The developer wants to test the array shown:

const arr = Array(5).fill(0)

Which two tests are the most accurate for this array? Choose 2 answers:
A . console.assert( arr.length === 5 );
B. arr.forEach(elem => console.assert(elem === 0)) ;
C. console.assert(arr[0] === 0 && arr[ arr.length] === 0);
D. console.assert (arr.length >0);

Answer: A,B