Question $39(1$ point$)$

Listen

In the following code, what is the argument $1$ variable?

string color$1=$ "blue";

string color$2=$ "green";

string message $=$ String.Format$("$We offer this shirt in $\{0\}$ and $\{1\}$ colors.", color$1,$ color$2)$

Question $39$ options:

a$)$

"blue"

b$)$

color$2$

c$)$

color$1$

d$)$

green"