Some states are running out of license plate numbers. delaware currently uses six-digit numbers in its license plate numbering system. the state of washington recently stated that it needs to explore options to replace their current system of three numerical digits followed by three letters. new jersey currently uses a system of one letter, two numerical digits, then three letters. how could the state of washington change their license plate system to address the possible problem of running out of plate numbers? a. washington can use 6 digits or letters for their numbering system. b. washington can use more than 6 digits or letters for their numbering system. c. washington can use 3 digits or 3 letters for their numbering system. d. washington can use 6 letters for their numbering system.