So I'm doing my economics assignments, and just let me say these things aren't worded well, but I will give them precisely what they ask for.
I do however wish I could answer questions like
"Can you think of four reasons that may have triggered this behaviour in the index?"
with
"No I can not"
and expect full marks. If they wanted a real answer then the least they could do was say
"List four causes for the behaviour of the index."
So tempting... must not make situation worse....