It’s number 1 the question is what is the greatest number of rows that their rectangles could have had

Question writers have to find different ways of asking the same question. Here we're being asked the Greatest Common Factor of 20, 28, and 44. Let's calculate that; then we'll talk about why.
[tex]GCF(20, 28, 44) = GCF(2 \times 2 \times 5, 2 \times 2 \times 7, 2 \times 2 \times 11) = 2 \times 2 = 4[/tex]
Answer: 4
Because 4 is a factor of 20, 28 and 44 it makes a rectangle with each of them: 4 by 5, 4 by 7, 4 by 11. Because 4 is the greatest common factor, that's the greatest number of rows that can be a common factor, which is what the question asks.