You are trying to insert a word from the Concordance window into your document (see screenshot). Why is the command insert into document inactive? A、Because the cursor is not positioned in the target cell of the side-by-side editor. B、Because this function is not available in the first release of SDL Trados Studio. C、Because there is a match discrepancy, i. e. there is no match for the selected unit, but the Concordance hit is a 100% match. D、Because the selected unit has no TM match.