Which of the following were effects of the arms race? select all that apply.

a. fear of nuclear attack
b. cooperation in space exploration
c. building of large numbers of fallout shelters
d. increased study of science and math
e. heightened world tensions
f. greater trade between the east and west

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.

i really really really really really really dont know