choices.label: A B C D
choices.text: tax invoices:vouchers:distribution of income hotel:place:receiving guests engine:car:providing power surgery:hospital:treating disease
explanation: "organs" include "skin," which "regulates body temperature.". "vouchers" include "tax invoices". "distribution of income" is not the function of "tax invoices", and the function of "distribution of income" is taxation. "hotel" belongs to a "place", and "receiving guests" is the function of the hotel. "car" includes "engine". "hospital" can perform "surgery".
relation: skin regulate body temperature R2.2
relation: skin regulate body temperature R3.10
relation: tax invoices vouchers R2.2
relation: hotel receiving guests R2.2
relation: hotel receiving guests R3.10
relation: engine car R2.3
relation: surgery hospital R3.10