What kind of stylistic device did the author use in the phrase "as pine roots cracking granite to grow"

A．the wonders of travel
B．her growth from an innocent child to a learned woman
C．the benefits of reading
D．the difference between childhood dreams and life's realities

A．About many foreign places.
B．About many historical figures.
C．About the outside world as well as her own self.
D．About the ironies of lif