Factor the following expression using the gcf. 4dr – 16r r

(4d – 16)
2r(2d – 8)
4(dr – 4r)
4r(d – 4)

Can you me with this question? i'll reward *30 points i just need with this one question so that i could solve the others. * edit: i originally set up the question to reward 30 points, but for some reason i can only reward 15. if you don't get 30, then i'm sorry. i'm still kind of new to this site