The same paragraph is repeated four times below. Choose the one that correctly uses periods, exclamation marks, and question marks where needed. A. Do you know that most people spend most of their waking hours indoors. Current statistics show as much as 80% of the day is spent confined to a building whether at home, school, or work! Since so much time is spent indoors, it is important that the indoor air be clean. However, the truth is that indoor air is not very clean. Dust mites, mold spores, chemical residue from paint and glue, and countless other pollutants exist indoors! Have you seen the little particles floating in the air when sunlight shines through a window! Wow, what dirty air. Something needs to be done?

B. Do you know that most people spend most of their waking hours indoors? Current statistics show as much as 80% of the day is spent confined to a building whether at home, school, or work. Since so much time is spent indoors, it is important that the indoor air be clean. However, the truth is that indoor air is not very clean. Dust mites, mold spores, chemical residue from paint and glue, and countless other pollutants exist indoors. Have you seen the little particles floating in the air when sunlight shines through a window? Wow, what dirty air! Something needs to be done.

C. Do you know that most people spend most of their waking hours indoors? Current statistics show as much as 80% of the day is spent confined to a building whether at home, school, or work! Since so much time is spent indoors, it is important that the indoor air be clean. However, the truth is that indoor air is not very clean! Dust mites, mold spores, chemical residue from paint and glue, and countless other pollutants exist indoors! Have you seen the little particles floating in the air when sunlight shines through a window. Wow, what dirty air! Something needs to be done!

D. Do you know that most people spend most of their waking hours indoors. Current statistics show as much as 80% of the day is spent confined to a building whether at home, school, or work. Since so much time is spent indoors, it is important that the indoor air be clean. However, the truth is that indoor air is not very clean. Dust mites, mold spores, chemical residue from paint and glue, and countless other pollutants exist indoors. Have you seen the little particles floating in the air when sunlight shines through a window? Wow, what dirty air. Something needs to be done.