Why are the so few users left with versions 1.0 and 1.1?

• A. the first phones were released with version 1.5
• B. 1.0 and 1.1 had security holes that forced carriers to recall phones using them
• C. 1.0 and 1.1 are just number designations for the version apple’s iphone is running
• D. everyone with 1.0 and 1.1 were upgraded to 1.5 over the air automatically