Seattle Paint Company Developed a New Exterior House Paint That

Seattle Paint Company developed a new exterior house paint that can be properly applied even in the rain.How can this formula be protected without filing for a patent?

A) Without a patent, no protection is available.
B) If the company takes all reasonable steps to avoid discovery of the trade secret, it can be protected against some, but not all, methods of discovery of the secret.
C) by putting a notice on the cans of paint that the formula is a protected trade secret
D) by registering a trademark for the product specifying that the product is distinctive
E) by filing a trade secret application with the U.S. Patent and Trademark Office