A steady increase in global temperature has been recorded between 1900 and today. Before concluding that this rise in temperature is the result of the increased burning of fossil fuels, which of the following questions would have to be answered?

A. What is the CO2 content in one metric ton of fossil fuels?B. Which gases are released when burning fossil fuels?C. What, if any, temperature rise was occurring prior to 1900?D. How have humans adapted to temperature change?

What, if any, temperature rise was occurring prior to 1900?

Explanation:

Before concluding that that rise in temperature is the result of burning of fossil fuel, they would have check what temperature rise occurring prior to 1900 and check if there is any temperature rise prior to 1900.

the answer is d (apex) good luck : ))

endo:

regulates body hormones, aldosterone, vasopressin

neural:

signal, regulates body using electric signals, reflex

endo has to do with hormones; aldosterone and vasopressin are both hormones. i also had this question and got it right : d