Ahigh school biology teacher asks her students to collect daily rainfall amounts at each of their homes during the summer. the results will be collected and used to establish a baseline for local weather patterns. what one aspect of the data gathering should the teacher emphasize most to the class?

Below are the choices:

a. creating an online chat group for asking questions and posting solutions
b. establishing a standard method for delivering the results to the teacher
c. offering a wide variety of rain gauges for everyone to choose from
d. using a standard unit of measure for the duration of the study

the answer is D. I hope it helps. 

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