HELP HELP PLEASE

geoff surveys the students in his class to find out if they prefer Dippo or fraz soda. He reports his data in the table balow and creates the circle graph from it. from his graph he concludes that more than half of the class prefers dippo. What is wrong with geoffs graph and conclusions

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.