Explanation:
It is extremely difficult to implement an information security program without the aid and support of the board of directors. If they do not understand the importance of security to the achievement of the business objectives, other measures will not be sufficient. Options B and (‘ are measures proposed to ensure the efficiency of the information security program implementation, but are of less significance than obtaining the aid and support of the board of directors. Option D is a measure to secure the enterprise information, but by itself is not a measure to ensure the broader effectiveness of an information security program.