AP Human Geography question! How was Thomas Malthus influenced by the Industrial Revolution?

Thomas Malthus argued that the unprecedented population growth will outpace the agricultural revolution, and this will result in deaths through starvation and hunger (Thomas). However, it did not happen. The industrial revolution was the driving force behind social change in Britain, especially the rural lives.

The answer is choice b

See diagram.we use washers to get the area and we will be integrating with respect to xouter radius is the  distance between y = e^x and y = -1    inner radius of washer is the distance between y = 1 and y = -1    the area of one cross-section of a washer is    solid lies between x = 0 and x = 2. the volume is    if you need this expanded, then    the question doesn't say to evaluate, so we're done.