Train A, with a length of 300 meters, is going in the south direction at a speed of 45 kilometers per hour. Train B, with a length of 240 meters, is going in the same direction at a speed of 60 kilometers per hour, 120 meters behind the rear end of train A. How long will Train B take to cross a person sitting exactly in the middle of Train A?

• A. 110 second
• B. 122.4 second
• C. 120.3 second
• D. 100.5 second