Jenna makes a design of 6 squares for every 4 circles. Staci makes a design of 9 squares
for every 6 circles. Alana makes a design of
15 squares for every 9 circles. Whose ratios
are equivalent?

A: Jenna and Staci only

B: Jenna and Alana only

C: Staci and Alana only

D: All three ratios are equivalent