Question

HELP?? REALLY NEEDED! WILL MEDAL

Answer 1

I know this is not economics but;
Aggregate Demand is everything produced while Simple Demand is one good. Which statement reflects Aggregate Demand?
A. Total output of diamonds in the world
B. Use of Consumer Price Index
C. Use of prevailing Market Price

Answer 2

is it b

Answer 3

Here's a guess.
diamonds are very specific. (And there's a song "diamonds are forever" ... or at least for geological eras or time scales to ruin it by going scientific on it.)
Most private consumers presumably go for "consumer" products.
Which is presumably less spec than "eternal" diamonds (some sparkle, they're all hard, and can be used for "beauty" or for "abrasion/cutting").
"The Markets", though, as often yakked on about by politicians cover everything. Oil market, (! barrel of "Brent crude oil" is apparently 50 gallons - I don't know what that translates to in terms of petrol for cars after cracking and refining.)
"commodities market", "gilt edge market", "utilities market.
Maybe take a look at the financial pages of a newspaper and, avoiding flying jargon, you may see that "The Markets" cover, well, just about every resource that is sellable, which is most of them.