The biggest problem with concrete is _____________

A. it is expensive
B. it requires highly skilled workers
C. it deteriorates if exposed to water
D. it is difficult to transport

Answer: C

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Sanchi, India, has one of the earliest surviving examples of

a) a stupa. a) a beehive tomb. c) a ziggurat d) a ka.

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What makes this project different from the usual school research paper that is based on books in a library?

What will be an ideal response?

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