Write a Matrix to Display the Information $\left[\begin{array}{r}-3000 & 3000 \\ 3000 &6000\end{array}\right]$

Multiple Choice

Write a matrix to display the information.
-Carney and Dobler sell home and mortgage insurance. Their sales for the months of May and June are given in the matrices.
Find the matrix that would give the change in sales from May to June.

A) $\left[\begin{array}{r}-3000 & 3000 \\ 3000 &6000\end{array}\right]$
B) $[-6000 9000]$
C) $\left[\begin{array}{rr}3000 & -3000 \\ -3000 & -6000\end{array}\right]$
D) $[6000 -9000]$