For whom is the lecture intended

A．She wanted the door repaired.
B．She couldn’t open the door.
C．She was waiting for the man.
D．She lost all her keys.

A．the canisters were fired at the main structure
B．the canisters were fired hours before the fire started
C．federal agents fired tear gas canisters capable of causing a fire
D．other tear gas canisters that were not flammable or potentially explosive were also used