Choose the correct code$($s$)$ to create a vector consisting of months of the third quarter $($July $-$September$)$ of the Julian calendar where each month is represented as many times as its chronological order within the $12$ month cycle. That is$,$ July would be represented $7$ times.

a$.$Q$2.$rep $=$ rep$($month$.$name$[7$:$9],$each $=$ c$(7,8,9))$

b$.$Q$2\mathrm{.}1=$ rep$($month$.$name$[7$:$9],$times $=$ c$(7,8,9))$

c$.$Q$2\mathrm{.}2=$ factor$($c$($rep$("$August$",$times $=8),$ rep$("$July$",$times $=7),$rep$("$September$",9)))$

d$.$Q$2\mathrm{.}3<-$ c$($rep$($month$.$name$[7],$times $=$ which$($month$.$name $==$ "July"$)),$ rep$($month$.$name$[8],$times $=$ which$($month$.$name $==$ "August"$)),$rep$($month$.$name$[9],$times $=$ which$($month$.$name $==$ "September"$)))$