sat-dog

Choice B is the best answer because it most logically completes the text’s discussion of the Indus River valley civilization. The text establishes that archaeologists haven’t been able to interpret the Indus River valley civilization’s writing system but have nevertheless acquired information about the civilization through historical artifacts. The fact that archaeologists have been able to learn about the Indus River valley civilization’s customs and community organization from historical artifacts suggests that it isn’t necessary to understand an ancient civilization’s language to learn about the civilization.

Choice A is incorrect because the text doesn’t discuss how easy it is to investigate ancient civilizations with or without knowledge of the civilization’s language; rather, it states that even though researchers have not yet deciphered the language of the Indus River valley civilization, they are still able to learn about it through historical artifacts. Choice C is incorrect because the text doesn’t make any claims as to what the focus of archaeological research should be. Rather, the text discusses how archaeologists have been able to learn about an ancient civilization through historical artifacts despite not understanding the civilization’s language. Choice D is incorrect because the text states that the civilization’s language has not yet been interpreted; it makes no mention of a debate about the language. Instead, the text suggests that examination of the historical artifacts has allowed archaeologists to learn about the civilization but has not aided thus far in deciphering its language.