In a day-of-the-week test of significant returns, the reported p-values for the t-statistics of C1, C2,C3, C4 and cs are 0.06, 0.01, 0.03, 0.09. and 0.04, respectively. Based on test at 5% significance level for a two-tail test, we can Select one: O a. reject Ho: c2 = 0. Ho: c3 = 0. Ho: cs=0 O b. reject Ho: 01 = 0, Ho: c4 = 0. O c. reject Ho: c1 = c = 0 O d. reject Ho: c2 = c3 = cs=0