Which of the following is not a reason as to why the vice-president would become president?
a. president dies
c. president is tried for impeachment charges and found guilty
b. president resigns
d. president is on a long vacation

the right answer is the constitution

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.