A $$300,000,10-$year, $8\%$ bond issue was sold to yield $9\%$ interest payable annually. Actuarial information for $10$ periods is as follows:

$8\%9\%$Present value of $10\mathrm{.}463190\mathrm{.}42241$Present value of an annuity of $16\mathrm{.}710086\mathrm{.}41766$

These bonds sold at

a$.$ a discount.

b$.$ par.

c$.$ a premium.

d$.$ margin.