Read the passage from a report on voter ID laws from the U. S. Government Accountability Office (GAO). Which statement best summarizes the passage? Based on GAO's review of studies by academics and others and information from federal and state agencies, GAO identified various challenges in information available for estimating the incidence of in-person voter fraud that make it difficult to determine a complete picture of such fraud. First, the studies GAO reviewed identified few instances of in-person voter fraud, but contained limitations in, for example, the completeness of information sources used. Second, no single source or database captures the universe of allegations or cases of in-person voter fraud across federal, state, and local levels, in part because responsibility for addressing election fraud is shared among federal, state, and local authorities. Third, federal and state agencies vary in the extent they collect information on election fraud in general and in-person voter fraud in particular, making it difficult to estimate the incidence of in-person voter fraud. GAO did a report on in-person voter fraud by reviewing many studies from academic and federal agencies, and they found that work very challenging to do when trying to determine in-person voter fraud in a single-source database. In-person voter fraud is hard to prove because few cases have been proven, there is no single-source database that compiles case information, and local, state, and federal agencies use different methods in collecting information. Local, state, and federal agencies have different ways to determine if in-person voter fraud can happen, and they do this by using a single-source database that collects a whole universe of cases across all three levels of government. Because of GAO’s report on academic, state, and federal agencies, a completeness of information on in-person voter fraud was collected and placed in a single-source database that local, state, and federal agencies can use. Because of GAO’s report on academi