She's a marketing whiz, and her brand was immediately picked up by a few popular blogs. She worked feverishly to produce a big inventory to keep up with the sales. After the first six months, her sales evened out, so she reduced her inventory. Now she knows how much inventory to keep to match her sales and her budget. Which of the following processes from systems theory explains this sequence?

positive feedback$--$ negative feedback $-$ homeostasis

input$--$ throughput$--$ output

enactments $--$ selection $=$ retention

onboard$--$ change$--$ product