Required information An internal control system consists of the policies and procedures managers use to protect assets, ensure reliable accounting, promote efficient operations, and uphold company policies. It can prevent avoidable losses and help managers both plan operations and monitor company and human performance. Principles of good internal control include establishing responsibilities, maintaining adequate records, insuring assets and bonding employees, separating recordkeeping from custody of assets, dividing responsibilities for related transactions, applying technological controls, and performing regular independent reviews. Sarbanes-Oxley Act requires each of the following:
A. An effective internal control.
B. Light penalties for violators.
C. Auditors must evaluate internal controls.
D. Auditor's work overseen by Public Accounting Board.

Options A and D.

Explanation:

Just like it is given in the question above, the concept of internal control system has to do with the regulations and policies that are being set by each companies/firms or agencies or bodies or business organization in order to increase their productivity and efficiency.

The Sarbanes-Oxley Act was enacted on the 30th day of the month of July in the year 2002 by the 107th United States of America congress and its main work or purpose is to make sure sure that there is reliability and transparency in financial and accounting institutions and also to protect investors.

When a breech is perceived, group of people will be appointed to conduct "An effective internal control" and also for the "Auditor's work overseen by Public Accounting Board."

answer (b); /// a method of measuring the opinions of a large group of people by selecting a subset of the larger group, asking them a set of questions and then generalizing those responses;