Final answer:
The study with a p-value less than the significance level is considered more reliable. Therefore, the correct answer is Option a)
Step-by-step explanation:
When comparing two studies with different levels of significance, the reliability of the studies can be determined by comparing the p-values to the significance level, usually set at 0.05. The study with a p-value less than the significance level is considered more reliable because it provides stronger evidence against the null hypothesis.
Therefore, the correct answer is Option a) The study with p < .01 is more reliable.