The p-value of 2.14% is the smallest significance level at which we can reject the null hypothesis.

Key concepts:

• P-value definition: The p-value is the probability of obtaining test results at least as extreme as the observed results, assuming the null hypothesis is true.
• Decision rule: If p-value ≤ significance level (α), reject the null hypothesis. If p-value > significance level, fail to reject the null hypothesis.

Analysis:

• At 3% significance level (α = 0.03): p-value (0.0214) < α (0.03) → Reject H₀
• At 2% significance level (α = 0.02): p-value (0.0214) > α (0.02) → Fail to reject H₀

Therefore, option C is correct because at a 3% significance level, we can reject the null hypothesis since 2.14% < 3%.