Which of the following is an accurate statement about improving air quality?

Question

A. Burning candles can help to mask odors and to clean the air.
B. Humidity should be below 40% to reduce mold and increase children's natural mucus.
C. It's important to ventilate buildings by opening the windows or having a ventilation system.
D. Since air quality if often worse outdoors than indoors, it's important to keep the windows closed.

my answer is b.

Answer 1

I disagree.

http://articles.mercola.com/sites/articles/archive/2014/01/13/low-humidity-health-effects.aspx

Answer 2

I was thinking that could be c.

Answer 3

I like c. But go with what you've learned from your text.

Answer 4

it takes me to the c.

Answer 5

thanks Ms.Sue

Answer 6

You're welcome, Priscila.