$12)$ You are computing the free cash flows for Kroger. Last year, one of Kroger$$s current liabilities was $$100$ in revolving credit with a bank$$that is$,$ they had a short$-$term loan of $$100.$ This year, you notice that Kroger paid off the loan and brought its revolving credit account to $$0.$ How much did Kroger$$s free cash flows increase due to this action? Assume a tax rate of $30\%$

$($a$)-100$

$($b$)0$

$($c$)100$

$($d$)-$$$70$