what is the $95\%$ confidence interval range for tarsus length in nonsurvivors?

a$.$

$18\mathrm{.}8119\mathrm{.}27$ mm

b$.$

$19\mathrm{.}1119\mathrm{.}58$ mm

c$.$

$20\mathrm{.}5022\mathrm{.}50$ mm

d$.$

$21\mathrm{.}6523\mathrm{.}21$ mm