Methylamine [meh-thil-ah-MEEN] reacts with 1-bromobutane [one-broh-mo-BYOO-tanel]by donating electrons into what orbital of the carbon at the one position of bromobutane?

W) C-C sigma bonding orbital

X) C-C sigma antibonding orbital

Y) C-Br sigma bonding orbital

Z) C-Br sigma antibonding orbital
Z) C-Br SIGMA ANTIBONDING ORBITAL