In the context of historical materialism, which of the following best describes the role of class struggle?

In historical materialism, class struggle is a central idea that explains how society changes over time. It suggests that different social classes, like the rich and the poor, have conflicting interests, which leads to conflict or struggle. This struggle is important because it drives historical change, as one class tries to gain power or improve its situation at the expense of another. For example, during the Industrial Revolution, workers fought for better wages and working conditions against factory owners, which eventually led to changes in labor laws. This shows how class struggle can lead to significant shifts in society and its structures.