Which best describes the central idea of this stanza? O Paul Revere will warn people

Which best describes the central idea of this stanza? O Paul Revere will warn people that the British are
coming as soon as he parts with his friend,
O Paul Revere will hang a lamp in a church to let his
friend know when the British are coming.
Paul Revere's friend will send a secret signal to
inform him of the British army's plan.
Paul Revere's friend will ride through the country
alerting everyone that the British army is on the
move