If the p-value for your test statistic (for example, a t-test) in a test of hypothesis is 0.03 or less, and the significance level alpha is set at 0.05, you conclude that:
a. the null hypothesis H0 should be rejected
b. both the null hypothesis H0 and the research hypothesis H1 should be rejected
c. the result is inconclusive
d. the null hypothesis H0 should not be rejected