N,N-Diethyl-M-Tolumide (DEET)is the Active Ingredient in Many Mosquito Repellents

N,N-diethyl-m-tolumide (DEET) is the active ingredient in many mosquito repellents.What is the hybridization state of carbon indicated by the arrow in the structure of DEET shown below?

A) sp
B) sp²
C) sp³
D) sp³d
E) sp³d²