The Instant Pot electric pressure cooker was introduced in $2010$ and had a slow start, but word of mouth from social media and influential bloggers created an explosive growth in demand for the versatil Competitors such as Ninja and Crock$-$Pot pressure cookers have entered the market and prices have begun to stabilize for Instant Pot. What stage in the product life cycle would the Instant Pot be$?$

a$.$ Introductory stage

b$.$ Growth stage

c$.$ Decline stage

d$.$ Maturity stage