What is the equation for electric field, given that \\epsi_(0)vec (E) = hat(r)a? (Use any variable or symbol stated above along with \\epsi_(0) as necessary.) Options: A. \\epsi_(0)vec (E) = hat(r) B. \\epsi_(0)vec (E) = a C. \\epsi_(0)vec (E) = hat(r)a D. \\epsi_(0)vec (E) = vec(r)a