Which of the following options identify the above graph?

Greatest Integer Function: The function $f:R\to R$

defined by $f\left(x\right)=\left[x\right],x\in R$ assumes the value of the greatest integer, less than or equal to $x$. Such a function is called the greatest integer function. From the definition of $\left[x\right]$, we can see that

$\begin{array}{l}\left[x\right]=-1\text{ for }-1\le x<0\\ \left[x\right]=0\text{ for }0\le x<1\\ \left[x\right]=1\text{ for }1\le x<2\\ \left[x\right]=2\text{ for }2\le x<3\text{ and so on. }\end{array}$

The graph of the function is given in the question.