The Best Way for a Terrorist to Weaponize and Disseminate

The best way for a terrorist to weaponize and disseminate a chemical nerve agent exposing a large number of people would be to:

A) put it in a paper bag in a crowded mall and puncture the bag with a stick.
B) throw a paper bag loaded with nerve agent onto a busy subway train.
C) steal a truck that sprays for mosquitos and aerosolize the nerve agent into a crowded subdivision.
D) throw a Molotov cocktail loaded with nerve agent into a windshield of a passenger bus.