The correct responses indicating why colonial minutemen were so prepared for the arrival of the British in Concord are:
- Paul Revere had warned villages that the redcoats were coming.
- When the British headed out, Americans hung two lamps as a warning signal.
These actions helped to alert the colonial militias about the British movements, allowing them to prepare for confrontation. The other options mentioned do not accurately reflect specific historical events related to the preparations for the British arrival.