If $M$ is any square matrix of order $3$ over $\mathbb{R}$ and if $M^{\prime}$ is the transpose of $M$, then $\text{adj}(M^{\prime}) - (\text{adj } M)^{\prime}$ is equal to
- A$M$
- B$M^{\prime}$
- Cnull matrix
- Didentity matrix
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