Final answer:
Social groups in Russia during the 1900's experienced significant inequality, with pronounced division between the rich aristocracy and the impoverished peasantry, leading to social and political upheaval and revolution.
Step-by-step explanation:
When asked to describe the equality and inequality among social groups in Russia during the 1900's, the correct response is that B. Social groups in Russia experienced significant inequality during the 1900's. At the start of the 20th century, Russia was predominantly an agrarian society with a stark division between the aristocracy and the peasantry. The nobles held vast swathes of power and wealth, while the peasants, even after the emancipation of the serfs in 1861, continued to struggle with poverty and lack of political freedom. This inequality contributed to social and political strife, which included intense demand for reform, the rise of new ideologies such as Marxism, and ultimately led to the Russian Revolution. Despite some government policies aiming to rectify these disparities, such as free elementary education and public health improvements, the societal divide was a driving force behind the revolutionary movements that characterized the early 1900's in Russia.