Answer:
A. change their research and include the study of materials other than paper and plastic.
Step-by-step explanation:
Since both paper and plastic grocery bags are causing harm to the environment, the scientists who study this issue will most likely change their research to include the study of alternative materials that could potentially have a lesser impact on the environment. This is a logical step as they want to find a solution to the environmental problem they are studying. Altering the data or deciding to let people believe that neither paper nor plastic bags are harmful would not be ethical or scientifically valid and would not contribute to finding a solution to the environmental problem. Reading about the work of other scientists through time may provide some new ideas, but it would not address the immediate issue at hand.
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