What is one way that city landscapes changed in the beginning of the twentieth century? a. the first skyscrapers were built. b. the first tenement apartments were built. c. the first structures using steel were built. d. the first transportation systems were built.

C.The first structures using steel were built.

Explanation:

The use of steel to build buildings began at the beginning of the 20th century, but became widespread after the Second World War, when this material became more available. Steel buildings have been widely accepted because they can develop structures much higher than with concrete, a situation highly valued in the large cities of the world where land is scarce. The development of steel buildings has had great innovation with the use of computers.

the committees of correspondence were the american colonies’ means for maintaining communication lines in the years before the revolutionary war. in 1764, boston formed the earliest committee of correspondence to encourage opposition to britain’s stiffening of customs enforcement and prohibition of american paper money. the following year, new york formed a similar committee to keep the other colonies notified of its actions in resisting the stamp act. in 1773, the virginia house of burgesses proposed that each colonial legislature appoint a committee for intercolonial correspondence. the exchanges that followed built solidarity during the turbulent times and bring about the formation of the first continental congress in 1774.