What was not a cause of many casualties during world war one?
a)mustard gas
b)trench warfare
c)atomic bombs
d)hand grenades

The correct answer is C. The atomic bomb didn't kill anyone or even get used until the second world war.

“destroyers for bases agreement in the destroyers for bases agreement between the united states and the united kingdom on september 2, 1940, fifty caldwell , wickes, and clemson class us navy destroyers were transferred to the toyalbnavy from the united states navy in exchange for land rights on british possessions.” i hope this you .