<prompt> Translate the following text to EnglishKila kitengo huchagua chaguzi za kudhibiti uzalishaji, mafuta, na viwango vya uzalishaji ili kuongeza faida yake ya usawa kwa majibu ya bei ya mafuta, bei ya kibali cha uzalishaji, na bei ya umeme kwa sehemu mbalimbali za mahitaji.  <response>: Each unit is assumed to choose emission control retrofit options, fuels, and generation levels so as to maximize its own net profit in response to fuel prices, emission allowance prices, and prices of electricity for various demand segments. 