multinationals - current vs temporal method

When we are converting ROA using the current rate and temporal methods, which currency do we use to convert “average assets” when we are using the temporal method?

For the current rate method it would be the current rate but for temporal there is a discrepancy between monetary and nonmonetary conversion rates.

Just wondering which one to use if they are asking about ROA generally as a potential qualitative question rather then provided line items of each type of asset.

I believe we should use historical rates for average assets under the Temporal method (since they are non-monetary assets like inventory, PPE).