Will I get rescinded?

I took two classes at an ivy university and received an A and a D respectively. On my application to a college I only reported the class I got an A, but right now since I’m admitted I need to send the complete transcript. Will the D ruin everything? Do I need to email the AO explaining about the D? Or it won’t really matter because the transcript does verify the information I put on the app?

Okay solved! I actually dropped the class but I was checking the old record.

Confused. How did you not know that you had dropped the class?