2.
Which sentence includes a subordinate clause?
A.
The Chinese government declared the South China tiger a pest in the 1950s, so thousands of these tigers were slaughtered.
B.
The Chinese government declared the South China tiger a pest in the 1950s.
C.
After the Chinese government declared the South China tiger a pest in the 1950s, thousands of these tigers were slaughtered.
D.
Thousands of South China tigers were slaughtered.