The correct is answer is B
<span>Advanced mathematics was critical to the development of the Mayan calendar. The Maya needed a system of mathematics to record celestial movements over the years, to handle large numbers, and to calculate the solar and lunar year with great precision.</span>
The Muckrakers were a group of journalists and writers that provided an important spark and ignited the Progressive movement. They were interested in exposing the problems in American society and urged the public to identify solutions.
They helped initiate the Progressive Era by analyzing if those bad conditions were linked to corrupt politics, poor working conditions in factories, bad living conditions of the working class and others.
They sparkled this analysis into people who read the newspapers and that wanted to change for their lives and because of that, an agenda was created.
