which of the following is an example of incidence? a$.$ approximately $1\mathrm{.}2$ million people in the U$.$S have HIV b$.$ HIV diagnoses are not evenly distributed across states and regions. the highest rates of new diagnoses continue to occur in the south c$.$ according to a CDC report, for every $100$ people with diagnosed HIV in $2021,$ about $75\%$ received some HIV care, $45\%$ were retained in care, and $66\%$ were virally suppressed d$.$ in $2021,$ an estimated $32,100$ new HIV infections occurred in the US