Question

after world war i, the rhineland was demilitarized, meaning that germany agreed
○ not to allow its citizens to live there.
○ to hold military exercises there.
○ to make it a french colony.
○ not to station troops there.

Explanation:

To solve this, we recall the meaning of "demilitarized". Demilitarization means removing military presence. After WWI, the Rhineland's demilitarization required Germany to not have troops there. The first option is wrong (citizens could live there). The second is wrong (military exercises are military activity). The third is wrong (it wasn't a French colony). The fourth matches the definition.

Answer:

D. not to station troops there.