单选题 A ball bearing is to be dropped into each of these beakers. In which experiment will the ball travel the slowest?

A、 Experiment 1, because water at 20 degrees Fahrenheit is ice!
B、 Experiment 2, because milk at 40 degrees Fahrenheit is ice!
C、 Experiment 3, because oil at 60 degrees Fahrenheit is ice!
D、 Experiment 4, because tar at 80 degrees Fahrenheit is ice!

【正确答案】 A

【答案解析】