4. which of the following was john rolfe's chief contribution to virginia's economy? a. his innovations in cultivating tobacco b. his innovations in rice cultivation c. his alliance with the powhatan through his marriage to pocahontas d. his invention of a better way to grow short-staple cotton

1. knighthood able-bodied men who are hired by the vassal for the protection of the lord 2. standing army a call to appear in court 3. subinfeudation group of soldiers ready to do battle 4. summons a man who would give protection to the lord in exchange for land 5. vassal breaking down an already-smaller portion of land in exchange for services and protection