Answer:
Pioneers faced many challenges on farming the Great Plains. In particular, they had to find solutions to farming problems such as ploughing the land, growing crops, lack of water, protecting the crops, fire, insects, farming machinery, and extreme weather.
The correct answer is B) People's votes show what parties they support.
The element of politics today that started with the election of 1840 was "People's votes show what parties they support."
In the US election of 1840, the Whig party candidate, William Henry Harrison, defeated Democrat Martin Van Beuren. However, a month later after Henry took the Presidential office, he died. Vicepresident John Tyler became the President. In this election, US citizens showed the preference they had when they decided to vote for a Whig candidate, instead of the traditional bipartisan candidates.