Answer:
B.RY/RS=RX/RT=XY/TS
Step-by-step explanation:
If Triangles RST and RYX are similar, then the ratio of their corresponding sides is:
Out of the given options, Option B is true.
I think the answer would be the 9 pack.
Think, if you divide each of the packs by their price the 9 pack is cheaper for one roll.