Choice "C" is correct. A reporting company is subject to having its registration revoked for willful violation of the securities laws.
Choice "d" is incorrect. A company can make a private placement even if it has stock listed on a national exchange.
Choice "a" is incorrect. There is no exemption from filing a 10K annually merely because a public offering was made that year.
Choice "b" is incorrect. Form 10K must be submitted to the SEC, not to the shareholders.