自由连锁总部与分店的关系是（）。

A.特许合同关系

B.管理与被管理的关系

C.协商与服务的关系

D.上级与下级的关系

Which firefighting method is an example of an indirect attack on a fire?（）.

A.Bouncing a straight stream of water off the overhead to create spray effect

B.Spraying foam on a bulkhead and letting it flow down and over a pool of burning oil

C.Flooding a paint locker with CO₂ and sealing the compartment

D.Cooling adjacent bulkheads with water to prevent the spread of the fire by conduction