Question

scientists studied the use of antiperspirants and deodorants. based on this excerpt, their experiments showed which two things? a using an antiperspirant or deodorant changes which microbes can live in an armpit. b people who do not use antiperspirants or deodorants have fewer microbes in their bodies. c deodorants increase helpful microbes, and antiperspirants increase harmful microbes. d use of deodorants and antiperspirants has no effect on the number of armpit microbes. e the number of microbes in the armpit decreases with antiperspirant and deodorant use. the scientists recruited volunteers who regularly used antiperspirants or deodorants and volunteers who used neither. the researchers asked all the volunteers to go about their normal routines for a few days. then none of them used an underarm product for a few days. finally all volunteers used antiperspirants. the researchers then compared the armpit microbes of each volunteer every day. the experiments showed that antiperspirants and deodorants radically changed the armpit microbiome. not only did those products reduce the number of microbes, but they also altered what types could live there.

Explanation:

The text states that antiperspirants and deodorants radically changed the armpit microbiome, reducing the number of microbes and altering which types could live there. Option A reflects the change in which microbes can live, and option E reflects the decrease in the number of microbes.

Answer:

A. Using an antiperspirant or deodorant changes which microbes can live in an armpit.
E. The number of microbes in the armpit decreases with antiperspirant and deodorant use.