Answer:C
Step-by-step explanation:
tallest flower=2 1/2
Shortest flower=1 1/4
Difference=2 1/2-1 1/4
Difference=(2x2+1)/2 - (4x1+1)/4
Difference=5/2 -5/4
Difference=(10-5)/4
Difference=5/4=1 1/4