The correct options are
B Smartphone penetration
C Multiple Wi-Fi access points
D Intelligent Lighting
The features of smart cities as follows: 1. Adopting smart grid technologies like renewable energy sources. 2. Using intelligent lighting to reduce the use of electricity. 3. Easing traffic congestion by using sensors to regulate flow of traffic. 4. Having multiple Wi-Fi access points. 5. Having smartphones as the platform for various apps that can be used to find parking, transportation and several other services.