23
(A) To interpret the effect of a rise in the cost of living
(B) To explore the phenomena of cave-dwelling or modern urbanization
(C) To understand the motives of the men and women who have acted in the past
(D) To illuminate the lives and thoughts of those who have left few or no written records

As historians have extended the scope範圍 of their work, they have also equipped準備 themselves with new methods and tools, the better to practice their craft技術.

No longer不再 do historians merely僅僅 pore over仔細閱讀、研讀 the same old千篇一律 chronicles編年史 and documents文件 to ask whether Charles the Fat was at Ingelheim or Lustnau on July 1887.

To introduce the evidence of statistics統計數字, they learn the methods of the computer scientist.

23 , they study economics.

(A) To interpret解釋 the effect of a rise in the cost of living 

(B) To explore the phenomena of cave-dwelling洞居 or modern urbanization城市化過程 

(C) To understand the motives of the men and women who have acted in the past 
(D) To illuminate照亮、闡明 the lives and thoughts of those who have left few or no written records