Which line from this excerpt contains subjective language?
O It was designed so any stress was shifted to the
steel supports inside - although the sea air did turn
the copper surface to a soft green tarnish.
The copper's thickness was about the same as two
pennies, and, combined with the frame, the pieces
were one inch thick.
Papa said Eiffel formed twelve thousand iron
pieces to the exact shape needed, and they fit
together using seven-billion nails.
The frame took more than two years to finish, and
it was hard for me to imagine the dedication
required to create such a magnificent structure.