The U. S. army gunned down unarmed Sioux at Wounded Knee Creek, South Dakota, in 1890 primarily because

fmr1 gene that can lead to fragile x-associated disorders.

explanation:

i'd assume india mainly because of how isolated japan was.   plus it is a whole china away.

just finished this it is b. centrifugal force

lancelot said to the beautiful ellen i c u r a b u t l n (i see you are a beauty lancelot was the greatest and worst of the knights who became the king's champion and undertook quests in the king's name. he became the adulterous lover of queen guinevere, and they had a son named galahad.