Hypothesis: mallard ducks grow to a larger size when fed on corn than when fed on rhubarb
which statement of purpose best defines the objective of an experment to test this hypothesis?
a. to see if mallards will eat corn and rhubarb
b. to determine the rate at which mallards eat corn when it is mixed with rhubarb
c. to measure the average size of mallard ducks
d. to compare the average weight of mallards raised on corn to the average weight of mallards raised on rhubarb

I say c

Explanation:

seems really along with the question unlike b but could also be d

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false because ozone (o3) depletion does not cause global warming, but both of these environmental problems have a common cause: human activities that release pollutants into the atmosphere altering it.

global warming is caused primarily by putting too much carbon dioxide into the atmosphere when coal, oil, and natural gas are burned to generate electricity or to run our cars.

explanation: