I need your help please

Consider a 1-in-10 systematic sample from a population of the N=650 employees listed by their positions from CEO to entry level engineer. To estimate the average annual salary of the employees in this firm, compared to a simple random sampling with the same sample size, which sampling strategy would lead to a more accurate estimator? a) The information provided is not enough to decide. b) simple random sampling c) systematic sampling They are about the same. d)