Explain how to find the critical values for a t-distribution. Click the icon to view the t-distribution table. Give the first step. Choose the correct answer below. A. Identify the level of significance a and the degrees of freedom, df =n-1. 1-a B. Identify the level of significance 2 and the degrees of freedom, d.f. n. OC. Identify the level of significance 1-a and the degrees of freedom, d.f. n. OD. Identify the level of significance and the degrees of freedom, d.f. =n-1. Find the critical value(s) using the given t-distribution table in the row with the correct degrees of freedom. If the hypothesis test is left-tailed, use the column with a "Two tails," "One tail, 2 "One tail g" sign.