Which best describes the impact of railroad expansion on the steel industry?
a. it did not affect the demand for steel at all.
b. it decreased the demand for steel since railroad tracks were build from wood.
c. it increased the demand for steel since steel was used to make railcars and tracks.
d. it decreased the demand for steel since the railroad was generally not used to transport steel.

. political or economical policy that isolates a country from participating in international relationships. it has been suggested that the united states participates in isolationism because of its lack of involvement in particular wars or alliances.

valentina tereshkova

soviet cosmonaut valentina tereshkova became the first woman to fly to space when she launched on the vostok 6 mission june 16, 1963. valentina tereshkova was the first woman to go into space. in 1963, she spent almost three days in space and orbited earth 48 times in her space capsule, vostok 6.jan 22, 2018