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.
The foreign investment is problematic for the economy of a transitioning country because it provides profit to the foreign investors only. They use cheap labor of the developing country. Moreover, the local producers and investors are directly harmed.
Is This a question or do you want people to look into it ? I’m not sure what you’re asking