Respuesta :

Answer: Choice D

Explanation:

The ratio 35:21 fully reduces to 5:3 after dividing both parts by the GCF 7.

35/7 = 5

21/7 = 3

Or put another way, the ratio 5:3 scales up to 35:21 after multiplying both parts by 7. Because of these equal ratios, the two rectangles are considered similar.