Why is Wikipedia sometimes an unreliable source?

Because its sometimes not accurate

Sometimes it is unreliable because anyone, like anybody can go on to it and edit it. I can even go on one right now and edit it. So if anyone can just do that it might not be correct 100% of the time.

the event that was most responsible for ending the great depression is world war 2.

when in doubt choose c

it's what my teacher told my class when we were going into psats