Cart A moves horizontally on a frictionless track. It collides and sticks to identical cart B, which is at rest. The speed of cart A before the collision is measured to be 3.0 m/s , with an uncertainty of\uline{+}~0.2 m/s. Students are asked to predict the speed of the carts after the collision. Given the uncertainty of the measurement for the speed ofcart A, which of the following is the best prediction? 
选项为:A:1.1 to 1.9 m/s  B:1.2 to 1.8 m/s  C:1.3 to 1.7 m/s  D:1.4 to 1.6 m/s  请回答其中一个选项.