Millie ordered clothes from a mail order catalog. No time was specified as to when the goods would be shipped. In such a case the FTC requires that the company must ship the goods to Millie

$$ a$)$ within $3$ business days after receiving the order.

b$)$ within $10$ business days after receiving the order.

$$ C$)$ within $30$ days after receipt of the order.

$$ d$)$ within a reasonable time and within time lines consistent with industry standards.