Which one of the following is true? O a. The significance level of a test is the probability that the null hypothesis is false. O b. The p-value of a test is the probability that the null hypothesis is true. O c. A null hypothesis is rejected at the 0.025 level is also rejected at 0.05 level of significance. O d. None of the suggested answers are correct O e. If a null hypothesis is rejected against an alternative at the 5% level, then using the same data, it must be rejected against that alternative at the 1% level