On the Historical Diagram with (Y/YN) on the Horizontal Axis

Multiple Choice

On the historical diagram with (Y/YN) on the horizontal axis, the disinflationary loop that began in 1981 contained an unusual movement almost straight downward during ________, attributable to ________.

A) 1983-84, an adverse supply shock
B) 1983-84, renewed disinflationary monetary policy
C) 1985-86, a beneficial supply shock
D) 1985-86, renewed disinflationary monetary policy
E) 1990-91, the catching-up of expected inflation