Answer :
I chose the Tenure of Office Act. The other choices are offices that Congress taps when there is a need for an investigation. Depending on the issue, Congress will assign any of these institutions to look into anomalies if there is a need to investigate.
The Tenure of Office Act
the Tenure of Office Act could not help congress with investigation because the Tenure of Office Act was a United States national law which was in power from 1867 to 1887. It was created with the aim to limit the power of the President of the United States to withdraw certain office-holders without the permission of the Senate. The act was passed on March 3, 1867, over the veto power of President Andrew Johnson.