choices.label: A B C D
choices.text: market economy:commodity economy short stories:fiction hydrogen chloride:hydrochloric acid missile:helicopter
explanation: a "tribe" is composed of several "clans" that are closely related by blood, and a "clan" is a part of a "tribe". the "market economy" is also called a socialized "commodity economy", and the "market economy" is a manifestation rather than a component of a developed "commodity economy". a "short story" belongs to "fiction" and a "short story" is not part of "fiction". the aqueous solution of "hydrogen chloride" is "hydrochloric acid", and "hydrogen chloride" is a part of "hydrochloric acid". the "missile" can be mounted on the "helicopter", but the "missile" is not part of the "helicopter".
relation: clan tribe R2.3
relation: market economy commodity economy R2.2
relation: short stories fiction R2.2
relation: hydrogen chloride hydrochloric acid R2.3
relation: missile helicopter R3.10