Choice "B" is correct. Significant deficiencies in the design or operation of internal control should be communicated to management and those charged with governance because they are important enough to merit attention by those responsible for oversight of the company's financial reporting.
Choice "d" is incorrect. Manipulation or falsification of accounting records may not represent an internal control deficiency (e.g., if such fraud occurs through collusion).
Choice "c" is incorrect. Information indicative of a going concern problem is not an internal control deficiency.
Choice "a" is incorrect. Irregularities or illegal acts may not represent deficiencies in internal control (e.g., if such acts occur through collusion).