im my humble opinion i think the correct answer will be letter d hope it works!
for me, both b and d make sense. do you have any text i can read?
one of these is the rhoticity common in most american accents, because in the 17th century, when english was brought to the americas, most english in england was also rhotic.
the correct answer is by starting and participating in the united nations. the un was the international peacekeeping organization formed directly after world war ii was called off. the soviet union created a buffer zone between itself and the western powers by taking over some western countries in europe.