Contract owners of registered index$-$linked annuities $($RILAS$)$ can lose money based on decreases in the value of the stock market index, but they can limit their losses by using buffers and floors. For a given RILA, suppose that, at the end of the term, the index dropped $35\%$ in value, but the RILA's accumulated value decreased by $15\%.$ With regard to buffers and floors, this RILA has a

buffer of $5\%$

buffer of $15\%$

buffer of $20\%$

floor of $20\%$