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 built 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.

How did emperor justinian’s review of roman laws create a more efficient legal system? a.he got rid of outdated and repetitive laws.b.he ranked the laws according to importance.c.he created new laws to address modern situations.d.he combined minor laws into stricter categories.ill mark brainliest

Excerpt from w. e. b. du bois jon reese 4 du bois was one of the first male civil rights leaders to recognize the problems of gender discrimination. he was among the first men to understand the unique problems of black women, and to value their contributions. he supported the women's suffrage movement and strove to integrate this mostly white struggle. he encouraged many black female writers, artists, poets, and novelists, featuring their works in his crisis magazine and sometimes providing personal financial assistance to them. the cause was that w.e.b. du bois encouraged many black female writers, artists, poets, and novelists. what was the result? think about cause-and-effect relationships.

When conducting research for forming a hypothesis, which practice should historians follow?