What Measurement Should Be Performed to Check Whether the Overdrive/direct

What measurement should be performed to check whether the overdrive/direct clutch assembly is installed properly on a GM 6T40 transmission?

A) Measure the clutch pack clearance when it is installed with a feeler gauge.
B) Measure the distance from the top of the intermediate steel plate to the lip of the transmission case in three different places.
C) Measure the end play of the input shaft.
D) Measure the thickness of the thrust bearing.