A map of North America with international borders, state borders and province borders is shown. The map legend displays four types of borders. State and province borders are shown as a grey line and international borders are shown with a thick dark line. State river boundaries are shown with a thin blue line and international river boundaries are shown with a thick blue line. © 2011 Map Resources Which of the following statements is true about the map above? The border between Texas and New Mexico is a thin line, indicating a national border. The border between Alaska and British Columbia is a thick line, indicating a national border. The border between Haiti and the Dominican Republic is a thin line, indicating a state border. The border between North Dakota and South Dakota is a thick line, indicating a state border.