Select the term below that is correctly matched to its definition:
A) Domino theory: belief that economic growth in one sector will eventually trickle down into adjoining sectors
B) Proxy war: when two superpowers support conflicting factions in different countries, leading to ideological confrontations that reflect the differences between the superpowers, even though those superpowers do not directly engage with one another in battle
C) Suburb: poor section of an urban center where most of the population resides in multi-family housing that is owned by the government
D) Coup d'etat: when a democratic election goes smoothly and the result is not contested