Megan hypothesized that type AB+ is the most common blood type in the United States. After conducting a literature search, she discovered the graph at right. Based on the information in the graph, which blood type is most likely to be in shortest supply during an emergency? ✔ AB- Which statement is most likely Megan’s conclusion? The hypothesis is supported because the most common blood type in the United States is AB+. The hypothesis is not supported because the most common blood type in the United States is O+.