Deformed wing virus is an RNA virus that infects European honeybees {Apia meifera]. This virus currently remains absent in Australia but is present in New Zealand. As a potential incursion pathway into Australian stock, New Zealand is carefully monitoring the levels of deformed wing virus locally. A total of 200 peehives were randomly sampled in three major agricultural districts in New Zealand [where'l adult worker bee was taken from each hive}. The prevalence of deformed wing virus was quantified in each specimen, with an interest in comparing average viral loads between the three agricultural districts. What type of study is this? Select one: Experimental Stud).r using a Randomised Block Design Experimental Study using a Retrospective Design Retrospective Observational Study Census Observational Study using a Randomised Block Design 3 Experimental Study using a Prospective Design Prospective Observational Study Quest ionaire