Knowing only their packing groups, which of the choices below would you say presents the greatest relative degree of danger? 1. A. Amatols, see Explosives, blasting, type B 2. B. Amines, flammable, corrosive, n.o.s. or Polyamines, flammable, corrosive, n.o.s., PGI 3. C. Amines, flammable, corrosive, n.o.s. or Polyamines, flammable, corrosive, n.o.s., PGII 4. D. Armines, flammable, corrosive, n.o.s. or Polyamines, flammable, corrosive, n.o.s., PGII