Question $2$

A data analyst creates a bar chart with the diamonds dataset. They begin with the following line of code:

ggplot$($data $=$ diamonds$)$

What symbol should the analyst put at the end of the line of code to add a layer to the plot?

$1$ point

The equals sign $(=)$

The ampersand symbol $($&$)$

The pipe operator $(\%>\%)$

The plus sign $(+)$