Which of the following statements is a mad goal? i will beat the county wrestling champion in my weight division in my first match. i will dance for 300 hours this month to prepare for the end-of-the-year recital. i will swim the length of the pool five times without taking a breath. i will improve my batting average by two points before the end of the season.

pathogens is the answer

                                                        water

a colorless, transparent, odorless, tasteless liquid that forms the seas, lakes, rivers, and rain and is the basis of the fluids of living organisms.

                                                        halon  

any of a number of unreactive gaseous compounds of carbon with bromine and other halogens, used in fire extinguishers, but now known to damage the ozone layer.

                                                  dry chemical

extinguishing agent used on class a, class b, and class c fires.

                                                  carbon dioxide

a colorless, odorless gas produced by burning carbon and organic compounds and by respiration. it is naturally present in air (about 0.03 percent) and is absorbed by plants in photosynthesis.