During the prosperous 1990's the sales of very expensive cars, suvs, and limosines increased temendously. give the economic explanation for this trend.

true, i don't really know what you're asking but from the info you provided im guessing the answer is true.

the menstrual cycle – higher tier. negative feedback mechanisms affect the production of hormones in the menstrual cycle. oestrogen also stimulates the release of lh (luteinising hormone) from the pituitary gland, which in turn controls the production of progesterone.