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Answer: Keeping up with the Joneses is an idiom in many parts of the English-speaking world referring to the comparison to one's neighbor as a benchmark for social class or the accumulation of material goods. To fail to "keep up with the Joneses" is perceived as demonstrating socio-economic or cultural inferiority.
C. this is a clear appeal to emotion because it appeals to our emotions that get elicited when someone says "we, as human beings, ...". This is supposed to elicit our compassion and feelings of empathy towards other people.
For that reason C is the only correct answer.
