Arrange the following steps in order to describe the functioning of attention mechanisms in sequence modeling: A) Compute attention scores B) Generate context vector C) Apply attention scores to the input sequence D) Use context vector for downstream tasks

The system first calculates attention scores to see how much each part of the input matters. Other options are incorrect because This order puts the context vector right after computing scores, then applies scores after that, which is impossible; It suggests applying scores before they are calculated, which defies logic.