How many days do new residents of California have to obtain a valid California driver's license?

Answer: B — 10 days

New residents of California are required to obtain a valid California driver's license within 10 days of establishing residency. This rule is in place to ensure that all drivers on California roads are familiar with state traffic laws and regulations, as well as the unique driving conditions that may exist in the area. Obtaining a California driver's license within this timeframe helps to create a consistent standard for identification and ensures that all drivers meet the state's requirements for licensing, thereby increasing road safety. The other choices reflect time frames that do not align with the state's regulations for new residents, emphasizing the importance of understanding local laws when relocating.