C$.(1)$Few products last forever. $(2)$Most products go through distinct stages of a product life cycle. $(3)$The first stage in the product life cycle is the introductory stage. $(4)$During this first phase, the producer tries to stir up demand. $(5)$Typically$,$ this stage involves expensive advertising and promotion, plus research and development costs. $(6)$Next comes the growth stage, marked by a rapid jump in sales as the introductory efforts start paying off. $(7)$As the product enters the growth phase, competition increases, and the war for market share begins. $(8)$During the third stage, the maturity stage, product sales begin to level off or show a slight decline. $(9)$The key to success in the maturity phase is to encourage sales of the existing product by broadening its appeal or making minor improvements. $(10)$Sooner or later most products enter the decline stage. $(11)$During this last phase, sales and profits begin to slip and eventually fade away.

C$10.$ Which answer best completes the map of this passage?

$>$

Oval $2$ Decline stage: Sales and profits slip and fade away

Oval $4$ Growth stage: Rapid jump in sales; competition increases; war for market share begins

Oval $2$ Introductory offers start paying off; rapid jump in sales;

Oval $4$ Sooner or later sales and profits slip and eventually fade away

Oval $2$ Growth stage: Rapid jump in sales; competition increases; war for market share begins

Oval $4$ Decline stage: Sales and profits slip and fade away