How did george westinghouse contribute to railroad transportation?

a. his invention of air brakes made railroad travel safer & faster.

b. his development of the sleeping car made railroad much more comfortable.

c. his invention of the steam engine made railroad travel faster and more affordable.

d. his creation of a railroad network make railroad travel more efficient.

In a group discussion, which of these is the best example of synthesis claims into a single conclusion?

How was rockefeller able to build his monopoly across the oil industry? he found newer and cheaper ways to refine oil, increasing his profits. he confined his business to ohio so he could buy all the refineries there. he bought up oil refineries, cut costs, and reinvested his profits in other refineries. he began to sell kerosene as well as oil, expanding his market.

By the late 1930s, how were u. s. officials beginning to view japanese policies of expansion? a. they attempted to join forces with japan so as to increase u. s. territory. b. they warned them to stop expansionist actions or face potential u. s. intervention. c. they sent representatives to japan to work out territorial rights in a diplomatic fashion. d. they became fearful of their military power