Today, more than 50 years later, nearly two million people a year ride the 1,250 feet up to its lofty tower to gaze out over Manhattan and marvel at the city scene spread out below them. On a clear day you can see 50 miles away. It is both unnerving and exhilarating to realize that workmen have stood on exposed beams in the open air at this great height to build the very observation platform upon which you are standing.

—The Building of Manhattan,
Donald A. Mackay

Which words are closest in meaning to the words unnerving and exhilarating?

weird and scary
awful and annoying
scary and exciting
unexciting and boring

it was C) scary and exciting