37. How many of the following statements are false? I：the Group 3A elements are all metals；II：Alkaline earth metals react less vigorously with water than do alkali metals；III：Salts can consist of hydrogen；IV：because Li is the strongest reducing agent among the alkali metals, it reacts most；V：quickly with water of the alkali metals (A) 1(B) 3 (C) 2(D) 4 (E) 0