The researcher concludes that: Select one: a. there is no autocorrelation in the squared residuals at the 5% level. b. the null hypothesis of no ARCH effects in the return on the yen is rejected at the 5% level c. the null hypothesis of ARCH effects in the return on the yen is not rejected at the 5% level d. the null hypothesis of no ARCH effects in the return on the yen is not rejected at the 5% level e. the null hypothesis of ARCH effects in the return on the yen is rejected at the 5% level