We are responsible for the installation and repair of the ______. A: equiped B: equipment

我们不能低估敌人，他们装备了最先进的武器。 A: We must not underestimate the enemy. They equipped with the most sophisticated weapons. B: We must not underestimate the enemy. They are equipped with the most sophisticated weapons. C: We must not underestimate the enemy. They are equiped with the most sophisticated weapons. D: We must not underestimate the enemy. They are equipped with the most sophisticate weapons.