13. According to the VSEPR model, the electron pairs around NH3 and those around CH4 are arranged (A)differently, because in each case there are a different number of atoms around the central atom. (B) the same, because both nitrogen and carbon are in the second period. (C) differently, because in each case there are a different number of electron pairs around the central atom. (D)differently or the same, depending on the conditions leading to maximum repulsion. (E) the same, because in each case there are the same number of electron pairs around the central atom.