European countries realized that by taking control of African territories they could secure a very cheap supply of raw materials that would ensure industrial success and overall economic prosperity. Colonial governments organized agricultural production in the colonies to match the demand for raw materials in Europe.
Nixon's role in the Watergate scandal was that "<span>D. Nixon lied under oath when questioned about the break-in," although it was also alleged that he order the break-in on some level. </span>
To my knowledge, the correct answer among all of the given choices is C.) Steam. If I'm not mistaken, this was the time that more trains came into use.
I hope this is the answer you were looking for and that it helps!! :)