What happens to the flare cartridge M211 when exposed to oxygen?

The correct answer is that the flare cartridge M211 will ignite when exposed to oxygen. This ignition occurs due to the chemical composition of the cartridge, which contains compounds that react with oxygen to produce a combustion reaction. Flare cartridges are designed specifically to create a bright, burning signal, and oxygen is an essential component for the combustion process to take place.

When the cartridge is ignited, the presence of oxygen supports the flame and sustains the burning of the materials within the cartridge, thereby producing the expected visual signal. This reaction is intentional as the primary function of the M211 flare cartridge is to provide illumination or signaling in emergency situations. The design ensures that when activated in an oxygen-rich environment, the flare will fulfill its purpose effectively and safely.