BIDENS NEW RULE Get vaccinated or wear a mask till you do

My response - FU*CK U DEMENTIA JOE , Im not getting that poison injected into me and im not wearing mask indoor or outdoors so kiss my hairy balls

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Ascientist wants to use a model to present the results of his detailed scientific investigation. why would a model be useful? a )because the model makes the concepts easier to understand b) because the model is easy to put together and to use c) because the model prevents other scientists from asking questions d) because the model requires the audience to pay full attention to it i don't know what to choose because between a and d a is much more likely than d because it only wants to get the attention of the audience. i'm confuse.