Answer:
D) Room temperature
Explanation:
For the experiment to work and have good reliable results there should only be one variable. In this case, the variable is the noise level, and the different room temperatures would influence the experiment's results.
<span>In the absence of Vice President the speaker of
the house should resides. <span>The Speaker
of the House is the presiding officer of the United States
House of Representatives. <span>The Speaker is second in the United States presidential
line of succession, after the Vice President and ahead of
the President pro tempore of the U.S. Senate. In the United
States, the Speaker of the House is a leadership position and the
office holder who actively works to set the majority party's legislati<span>ve agenda.</span></span></span></span>
Answer:
He meant that they faced lots of danger
