What is an advantage of using foam in fire fighting?（）

A.It is effective in controlling fire in flowing oil such as coming from a broken fuel line

B.It absorbs heat from materials that could cause reignition

C.Most foams can be used jointly with dry chemical extinguishing agents to attack a fire by two methods of extinguishment

D.Once the surface is blanketed with foam and the fire is extinguished，no further foam is required