【单选题】The promise of finding long term technological solutions to the problem of world food shortage seems difficult to fulfill. Many innovations that were once heavily supported and publicized, such as fis...
A.
a suggestion is made and arguments in its favor are provided.
B.
a criticism is imposed and an alternative proposal is suggested.
C.
a generalization is advanced and supporting evidence is provided.
D.
an example is analyzed and general conclusions are derived from it.