How did Vietnam's landscape and geography create
disadvantages for American troops?

china unilaterally claims the entire south china sea as sovereign territory, then builds artificial islands to bolster its claim. it suddenly activates an air defense identification zone over the east china sea, and threatens to down any aircraft that does not report its position. it builds roads into indian territory, then redraws the maps to show that it is actually chinese territory. the people's republic under president xi jinping is quickly becoming the bully of asia.

a direct vote in which an entire electorate is invited to vote on a particular proposal. this may result in the adoption of a new law.  

may i have the answer choices ?