A firm can issue one of the listed bonds and convert them into the floating rate using IR swaps $($a buyer of an IR swap receives LIBOR rate in exchange for $3\mathrm{.}8\%$ fixed$).$ What is the lowest floating rate that the firm can get?

Bond A: $4\%($firm pays $4\%$ coupon$)$

Bond B: L $+0\mathrm{.}5\%($firm pays LIBOR $+0\mathrm{.}5\%$ coupon$)$

Bond C: $2$L $-3\mathrm{.}5\%($firm pays $2*$LIBOR $-3\mathrm{.}5\%$ coupon$)$

Options:

a$)$ L$+0\mathrm{.}1\%$

b$)$ L$+0\mathrm{.}2\%$

c$)$ L$+0\mathrm{.}3\%$

d$)$ L$+0\mathrm{.}4\%$

e$)$ L$+0\mathrm{.}5\%$