A. a shift from S f3 to S f2 .
B. a shift from S f1 to S f3 .
C. a rightward shift of D f .
D. a leftward shift of D f .
ANSWER:
A. a shift from S f3 to S f2 .
A. a shift from S f3 to S f2 .
B. a shift from S f1 to S f3 .
C. a rightward shift of D f .
D. a leftward shift of D f .
ANSWER:
A. a shift from S f3 to S f2 .