Cities were able to expand their geographic areas in the late 19th century because of the development of
a.
skyscrapers.
b.
settlement houses.
c.
assembly lines.
d.
mass transit.

b]to spread the message of black power

i believe your answer is d)

the answer that best explains what happened to george washington at fort necessity, pennsylvania is : washington was attacked by the french but was able to negotiate with them to peacefully end fighting. the battle took place on july 3, 1754. the battle is considered as being the start of the french and indian war.

which statement explains one of the reasons world war 1 was so much more destructive than earlier conflicts