The compound word “blackboard” means a board which color is black. This indicates that the meaning of a compound______.

The compound word “blackboard” means a board which color is black. This indicates that the meaning of a compound______.

A.can always be worked out by looking at the meanings of morphemes

B.is not always being the sum total of the meanings of its components, but often idiomatic

C.always can be find out by doing some guess work

D.None of the above

正确答案是B