"The California Right to Know Genetically Modified Food Act" Known

"The California Right to Know Genetically Modified Food Act" known as Proposition 37 will require food manufacturers to label food with genetically modified ingredients (GMOs) . If the bill passes, it will be the first law in the United States that required GMO labeling. Some European countries already mandate GMO labeling, but efforts to pass legislation in the United States have met resistance. Over a dozen other states have failed to pass proposed labeling laws. Food manufacturer argue that the bill is unnecessary because GMO are safe. They believe labeling will drive up food costs and will confuse consumers. Proponents of the legislation assert that consumers have a right to know what is in their food.
How many other states have tried to pass GMO labeling laws?

A) California is the first state to try to pass a GMO labeling law.
B) More than a dozen other states have tried to pass GMO labeling laws.
C) Ten states in the United States currently have GMO labeling laws.
D) Records are not maintained regarding what states have initiated GMO labeling laws.