Answer:
E. Lust and love are not contrasted in the passage. I'll put the evidence where the others are contrasted below.
Step-by-step explanation:
A. Inside and outside: "Ethan went to look at the cows and then took a last turn about the house. The earth lay dark under a muffled sky and the air was so still that now and then he heard a lump of snow come thumping down from a tree far off on the edge of the wood-lot." is the outside, and the rest is inside. So A is not the answer.
B. Dark and light: just as above, the outside and inside provide a contrast of light and dark.
C. Mattie and Zeena: "Zeena’s empty rocking-chair stood facing him. Mattie rose obediently, and seated herself in it. As her young brown head detached itself against the patch-work cushion that habitually framed his wife’s gaunt countenance, "
D. Youth and age: I'd use the same evidence as part C
E. Lust and love isn't discussed here. We know he lusts after Mattie, but his love for Zeena isn't in this passage.