In a clinical trial comparing a novel treatment to a placebo, a researcher calculates the difference in mean recovery times $\Delta = \mu_T - \mu_C$. After finding $\hat{\Delta} = 7.5$ with an estimated standard error $SE = 2.0$, the researcher wishes to construct a 95% confidence interval for $\Delta$. Given the assumption of approximate normality in the sampling distribution, which of the following expressions provides the correct upper bound for this interval?