The year 2009 marks the 50th anniversary of the opening of the solomon r. guggenheim museum in new york city. the museum was built as a place to display abstract art, and the architect of the museum was frank lloyd wright, america’s most famous architect. fifty years later, the museum is still a singular icon in a city considered by most to be america’s most artistic city. wright died at the age of 92, six months before the guggenheim opened. he had spent the last 16 years of his life working on the spectacular museum.
the guggenheim museum is one of wright’s most recognizable works. it is shaped as the upper two-thirds of an ice cream cone with a spiral groove running downward from the top. the spiral is a part of the building’s construction. inside the museum, the spiral takes the form of a ramp running from the top of the building to the bottom. guests walk around and around, downward, looking at art hung along the walls all the while. wright’s goal was for guests to view art and simultaneously see where they were going and where they’d come from.
on the 50th anniversary of the guggenheim museum, art lovers can take a moment to pause and think about two icons: the museum itself and its creator. rarely has a building been so controversial and so popular. the impressionist, post-impressionist, and modern art on view at the guggenheim truly has one of the world's greatest homes for artwork.

which sentence from the second paragraph supports the paragraph's main idea that "the guggenheim museum is one of wright's most recognizable works"?

a. "inside the museum, the spiral takes the form of a ramp running from the top of the building to the bottom."

b. "wright's goal was for guests to view art and simultaneously see where they were going and where they'd come from."

c. "it is shaped as the upper two-thirds of an ice cream cone with a spiral groove running downward from the top."

d. "guests walk around and around, downward, looking at art hung along the walls all the while."