7. Arrange the following reactions in order of increasing number of ATP production: (i) anaerobic catabolism of glucose； (ii) aerobic catabolism of glucose； (iii) aerobic catabolism of acetate； (iv) aerobic catabolism of palmitate. (A) i＜ii＜iii＜iv, (B) i＜iii＜ii＜iv, (C) i＜iv＜iii＜ii, (D) iv＜iii＜ii＜i, (E) ii＜i＜iii＜iv.