Problemas
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made it possible for air-cor doning systems to be used by
consumers
with no apparent harm,unlike the ammonia systems.
a. MILs
b. DTCs
c. CFCs
d. EPAs"
__ made it possible for air-cor doning systems to be used by consumers with no apparent harm,unlike the ammonia systems. a. MILs b. DTCs c. CFCs d. EPAs
Solución
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'C'
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## Step 1<br />The problem is asking us to identify the substance that made it possible for air-conditioning systems to be used by consumers without causing apparent harm, unlike the ammonia systems. The options provided are MILs, DTCs, CFCs, and EPAs.<br /><br />## Step 2<br />We need to understand what each of these abbreviations stands for. MILs stands for Military, DTCs stands for Direct-to-Consumer, EPAs stands for Environmental Protection Agency, and CFCs stands for Chlorofluorocarbons.<br /><br />## Step 3<br />Among these options, CFCs are known to be used in air-conditioning systems. They are non-toxic, non-flammable, and non-corrosive, which makes them safe for use in these systems.<br /><br />## Step 4<br />Moreover, CFCs are not harmful to the environment, unlike ammonia systems. Therefore, the answer is CFCs.
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