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