One can figure out the meaning of reading-lamp to be“lamp for re

One can figure out the meaning of reading-lamp to be“lamp for reading"by its______.
A、onomatopoeic motivation
B、morphological motivation
C、semantic motivation
D、etymological motivation
【正确答案】：B
【题目解析】：Chapter 5  P84. morphological motivation（形态理据）: Compounds and derived words are multi-morphemic words and the meanings of many are the sum total of the morphemes combined. Quite often, if one knows the meaning of each morpheme, one can figure out the meaning of the word. For instance, “airmail” means to ‘mail by air’.