In addition to Earthquake, hurricane, which of the following could be categorized as a "disaster" risk?

I think its a World War.

Explanation:

This is just what my sister told me, since the cost for the war could make a country poor and the damage it could cause could lead a country to disaster.

im not exactly sure but i think its b!

> b takes place in the gas phase in an isothermal tubular reactor. the feed is one mole of a per one mole of c, an inert. the entering temperature and pressure are 427°c and 10 atm, respectively. the gas constant r = 0.08206 atm · l/mol · k.