Which method was used in the Cross Tab tool to produce this output from the following input?

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Input:

$\backslash$table$[[$Record$,$Subject,,,Date$],[$Section$,$Teacher$],[1,$Calculus,$003,$Odom,$2022-09-26],[2,$Biochemistry,$002,$Britt,$2022-09-26],[3,$Biochemistry,$010,$Meyers,$2022-09-26],[4,$Calculus,$040,$Odom,$2022-09-26],[5,$Biochemistry,$011,$Meyers,$2022-08-26],[6,$Calculus,$007,$Britt,$2022-07-26]]$

Output:

$\backslash$table$[[$Output:$,,202207,2022\_0\_26,2022\mathrm{.}09\_26],[$Record$,$Subject,$2022,,$Odom.Odom$],[1,$Calculus,Britt,,$],[,$Biochemistry,,Meyers,Britt,Meyers$]]$

A$.$ Count

B$.$ Last

c$.$ Concatenate

D$.$ Sum