Which sentence represents the BEST elaboration to insert after sentence 6?
a. It makes one feel tiny to stand at the base of the dam.
b. Hoover Dam attracts thousands of tourists every year, generating millions of dollars for the state of
Nevada.
C. In fact, it was the first single structure to contain more masonry than the Great Pyramid at Giza.
d. However, the Grand Coulee Dam in Washington dwarfs the Hoover Dam with its sheer mass.