题目选项分析

The Federal investigators at Stapleton Industries have failed to find any evidence to suggest that the unusually large contributions to its accounts are derived from government kickbacks or that its officers are guilty of improper relations with industry regulators.

The Federal investigators at Stapleton Industries have failed to find any evidence to suggest that the unusually large contributions to its accounts had been derived from government kickbacks, nor were its officers guilty of improper relations with industry regulators.