The equilibrium price in the market has fallen and so has the equilibrium quantity. This could be happening because:

ATechnology is rapidly advancing

BFactor prices are falling

CIncome has fallen and it is a normal good

DFactor prices are rising

If consumer income fell and the cost of inputs used in producing a good also fell we would expect equilibrium price to:

AIncrease

BDecrease

CStay the same

DCannot say

If consumer income fell and the cost of inputs used in producing a good also fell we would expect equilibrium quantity to:

AIncrease

BDecrease

CStay the same

DCannot say

and please explain each pf then