How Is the Piano Different from the Harpsichord

How is the piano different from the harpsichord?

A) Piano strings are plucked, whereas harpsichord strings are struck by hammers.
B) The piano can be played only rather quietly, whereas the harpsichord has a wide dynamic range.
C) Piano strings are struck by hammers, whereas harpsichord strings are plucked by quills.
D) The piano has a tuned set of strings activated at the keyboard, whereas the harpsichord's strings are plucked directly by the performer.