题目

One way to prevent anxiety from getting out of control is to recognize its benefits. It is a mistake to think that we'd make better decisions if only we keep our feelings under control. Instead, a mix of feelings like anxiety and logical(合逻辑的) thinking leads to sound decision- making. It's true that there is plenty of research showing that higher levels of anxiety can make us more likely to avoid risks in our decision-making. There is also evidence that anxiety can increase the attention you pay to relevant information.Recent studies have shown that people who are anxious about their r小晃用一枚质地均匀的硬币做抛掷试验，前9次掷的结果都是正面向上，如果下一次掷得的正面向上的概率为P(A)，则(    )A.P(A)＝1        B．P(A)＝       C. P(A)＞       D. P(A)＜