Table 5-1 Shows Data on Real GDP and Employment for a Particular

Table 5-1 shows data on real GDP and employment for a particular country from the year 1991 to 2000. Use the table to answer questions .
Table 5-1

-Refer to Table 5-1. The trough(s) in economic activity occurred:

A) once in the ten-year period, in 1996.
B) twice in the ten-year period, in 1996 and in 2000.
C) once in the ten-year period, in 1991.
D) thrice in the ten-year period, in 1991, in 1996, and in 2000.