Why do historians consider political cartoons to be credible resources in historical inquiry?

Historians consider political cartoons to be credible resources in historical inquiry because they give a true picture of the political environment in that particular time period. ... Such cartoons are drawn by knowledgeable people who understand the public mindset very well.

Explanation:

b - those executed came from every social and economic class

increases in demand are shown by a shift to the right in the demand curve. this could be caused by a number of factors, including a rise in income, a rise in the price of a substitute or a fall in the price of a complement.

which the answer is:

b