I'm repsonse to the montgomery bus boycott, the supreme court

a) upheld montgomery's bus segregation law.
b) ruled that bus boycotts were illegal
c) declared bus segregation unconstitutional
d) did nothing

d. it adversely affected american productivity

what the first or next guy says

ww1 weapons: tank. tanks were used for the first time in the first world war at the battle of the somme. they were developed to cope with the conditions on the western front. the first tank was called 'little willie' and needed a crew of 3.