Answer:
B. "This new software system has been giving us problems for a while now."
Explanation:
Of all the given, answer B is the only impersonal statement. Passive voice is used and it is highly effective in remaining professional while communicating from a managerial role. By using an impersonal statement, the employee (Jack Blair) won't get offended by any means. Although he isn't personally mentioned in the answer E, he may feel guilt because there is someone else that is able to resolve the problem.