(Light-Emitting Diode)light Bulbs,which Have Been Available for Only a Few

(light-emitting diode) light bulbs,which have been available for only a few years in low lighting levels (lumens) ,are now coming to the marketplace in a 100 watt,7500 lumen equivalent.They are designed to replace incandescent and even compact fluorescent light bulbs,in part because of a federal law that phases out incandescent light bulbs in favor of more energy efficient ones.LED bulbs,which today can cost over $50 for a 100-watt bulb,will last up to 20 years.In what stage of the product life cycle is this product?

A) growth stage
B) decline stage
C) accelerated development stage
D) maturity stage
E) introduction stage