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When Jonas becomes the Receiver of Memory, he gets a rule that he may not tell his dreams. He wants to know how many of his $50$ classmates have the same rule. He asks $5$ friends from his class whether they may tell their dreams. Of those, $4$ say that they may.$\newline$Based on this data, which of the following conclusions are valid?$\newline$Choose $1$ answer:$\newline$(A) About $80 \%$ of all of Jonas's classmates may tell their dreams.$\newline$(B) About $80 \%$ of all people in Jonas's community may tell their dreams.$\newline$(C) $80 \%$ of the classmates in this sample may tell their dreams, but we cannot conclude anything about the population.