The correct answer is A) broad on the port bow. This is because the object is 45 degrees off the port bow, which is considered "broad on the port bow." The term "broad" indicates the object is near the beam of the vessel, rather than directly ahead or directly astern. Since the object is 45 degrees off the port bow, it falls within the "broad on the port bow" designation. The other options are incorrect because they do not accurately describe the position of the object relative to the vessel. Option B is incorrect because the object is not on the port beam (90 degrees off the port bow). Options C and D are incorrect because 3 points is equal to 33.75 degrees, not 45 degrees.