Recall the Application About the Possible Link Between the Value

Recall the Application about the possible link between the value of the U.S. dollar and the worldwide increase in commodity prices to answer the following question(s) . Starting in the summer of 2010, there was a rise in prices of commodities such as oil and food worldwide. Some economists suggested that monetary policy in the United States was the cause of the worldwide commodity boom.
-According to this Application, Janet L. Yellen, the Vice-Chair of the Board of Governors, believes that ________ in worldwide demand and ________ of supply were the primary cause of the worldwide increase in commodity prices.

A) increases; surpluses
B) increases; shortages
C) decreases; surpluses
D) decreases; shortages