Read the excerpt from Into the Unknown by Stewart Ross.

It was soon clear that the Ma Robert had serious design faults. Her engine was not powerful enough to drive her upstream against strong currents, and her boiler consumed vast quantities of wood: a day’s steaming needed one and a half day’s wood-cutting. Her hull was made of thin sheets of a new kind of steel that had not been tested. It soon developed so many holes that it leaked like a colander and had to be continually pumped out. “For us, steam was no labor-saving power,” Livingstone grumbled in his journal. He called the Ma Robert all sorts of names: “the wretched little steamer,” the “tin kettle,” and “the slow puffing Asthmatic.”

Which text feature would best support the details in the excerpt?

a photograph of Charles Livingstone
an illustration of Ma Robert
a map of the African continent
a chart of the many uses of steam

He leaned his head against the wall; his eyes were shut, his hands clasped in each other, and his body seemed to be sustained in an upright position merely by the cellar-door against which he rested his left shoulder. the lethargy into which he was sunk seemed scarcely interrupted by my feeling his hand and his forehead. his throbbing temples and burning skin indicated a fever . . there was only one circumstance that hindered me from forming an immediate determination in what manner this person should be treated. my family consisted of my wife and a young child. our servant-maid had been seized, three days before, by the reigning malady, and, at her own request, had been conveyed to the hospital. we ourselves enjoyed good health, and were hopeful of escaping with our lives. our measures for this end had been cautiously taken and carefully adhered to. they did not consist in avoiding the receptacles of infection, for my office required me to go daily into the midst of them; nor in filling the house with the exhalations of gunpowder, vinegar, or tar. they consisted in cleanliness, reasonable exercise, and wholesome diet. who is the story’s first-person narrator