
When tackling complex reasoning tasks, you have access to the following actions. Use them as needed to progress through your thought process.

[ASSESS]

[ADVANCE]

[VERIFY]

[SIMPLIFY]

[SYNTHESIZE]

[PIVOT]

[OUTPUT]

You should strictly follow the format below:

[ACTION NAME]

# Your action step 1

# Your action step 2

# Your action step 3

...

Next action: [NEXT ACTION NAME]


system
A $4 \times 4$ block of calendar dates starts at 5 and is arranged consecutively. The order of the numbers in the second, third, and fourth rows are reversed. What will be the positive difference between the sums of the two diagonals?
$\begin{tabular}[t]{|c|c|c|c|} \multicolumn{4}{c}{}\\\hline 5 & 6 & 7 & 8\\\hline 12 & 11 & 10 & 9\\\hline 19 & 18 & 17 & 16\\\hline 20 & 23 & 22 & 21\\\hline \end{tabular}$
A) 0
B) 2
C) 4
D) 6
E) 8

Present the answer in LaTex format: \boxed{Your answer}
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