Instructions Reread paragraphs 29-33 of the article. Then answer the multiple-choice questions that follow.

From “The Last Human Light” by Randall Munroe
Solar power
29 Emergency call boxes, often found along the side of the road in remote locations, are frequently solar-powered. They usually have lights on them, which provide illumination every night.

30 Like wind turbines, they’re hard to service, so they’re built to last for a long time. As long as they’re kept free of dust and debris, solar panels will generally last as long as the electronics connected to them.

31 A solar panel’s wires and circuits will eventually succumb to corrosion, but solar panels in a dry place, with well-built electronics, could easily continue providing power for a century if they’re kept free of dust by occasional breezes or rain on the exposed panels.

32 If we follow a strict definition of lighting, solar-powered lights in remote locations could conceivably be the last surviving human light source.

33 But there’s another contender, and it’s a weird one.
The author’s purpose in opening this section by introducing the topic of emergency call boxes is probably to:
Answer choices for the above question

A. Explain the process by which solar panels work.

B. Inform readers that lighted call boxes are often located in areas where there are few humans.

C. Describe why solar panels can last for so long without human intervention.

D. Tell readers how long a light powered by a solar panel would probably last.
In addition to answering the question of how long the power source might last, the information in paragraphs 30 and 31 —
Answer choices for the above question

A. explains why solar panels are used in remote locations.

B. explains why solar panels produce more reliable light than wind turbines.

C. provides absolute proof that solar-powered lights would be the longest lasting.

D. reminds readers of various factors that would affect how long a solar-powered light would shine.
From the last two paragraphs in this section, we can conclude this category of solar powered light sources will be followed by —
Answer choices for the above question

A. a table or other graphic feature about solar power.

B. descriptions of the kinds of lights that run on solar power.

C. a description of another category, perhaps a longer lasting light source.

D. explanations of the mechanical failures that might affect solar panels.