From the question, we are asked to find the row arrangement of a stack of boxes. Let us take a look at each one of the aforelisted answers
Since we are told that the total number of boxes to be stacked is 64, then for the first arrangement, we can deduce that the "x" is going to be 4. This is because multiplying 4 by 16 gives 64. For the second row, using the same calculation, we find that "x" is 8. And that of the third gives our "x" to be 4 as well. We can then adjudge that;
Bearing this in mind, we can see that each of the 3 answers fits into the requirements we are asked.
Hence, all of the options are correct.
To learn more about rows and columns, see here https://brainly.com/question/13196178