Which of the following statements is true?

a. The social auditing process is voluntary, whereas financial audits are mandatory for publicly traded corporations.

b. Law for publicly traded companies requires both financial audits and social audits.

c. The social auditing and the financial auditing processes are both voluntary processes that can provide great benefit to the company.

d. The financial auditing process and the social auditing process are both primarily concerned with the company's financial performance.

e. Financial auditing is generally optional for a corporation, whereas social auditing is mandatory for publicly traded corporations.