【简答题】Part IV Directions: In this section, you’ll hear some passages. At the end of each passage, you'll hear some questions. Both the passage and the questions will be spoken only once. After each question...
【单选题】第15-17题图.docx The table in the above figure shows the levels of output resulting from different levels of inputs. Returns to scale are greatest at which level of output? ______
A.
100-200 units
B.
400-600 units
C.
200-400 units
D.
There is insufficient information to answer the question