Which of these is a statement of opinion?
A
The Great Pyramid of Giza was constructed of millions of heavy blocks of stone.
B
The Great Pyramid of Giza was constructed before people invented modern machinery.
C
The theory that a pizza restaurant served reheated slices from other people's pies was
thought of by diners.
D
The theory that a pizza restaurant served reheated slices from other people's pies is
ridiculous.
