Answer:
Firstly, it is important to note that the multiplication of matrices is done in this way:
Columns x Rows or viceversa
Now, two matrices can be multiplied only if their dimensions are compatible, which means that the number of columns in the first matrix must be​​ equal to the number of rows in the second matrix.
In other words:
Two matrices A and B are said to be multiplies if the number of columns in A coincides with the number of rows in B.
In this context, the correct option is:
[tex]\left[\begin{array}{c}1&-1\end{array}\right] \left[\begin{array}{cc}0&4\end{array}\right][/tex]
Where A is:
[tex]\left[\begin{array}{c}1&-1\end{array}\right][/tex]
And B is:
[tex]\left[\begin{array}{cc}0&4\end{array}\right][/tex]
As you can see, the number of columns in A coincides with the number of rows in B
