In the sentence, certain words are in bold and numbered from A to E, which are the possible pairs to be interchanged. Choose the pair(s) of words which need to be interchanged to make the sentence grammatically correct and meaningful.

We are also (A) introduced to the (B) ingenious seeds of (C) crimson fountain grass, which choose not to (D) survive until the conditions are perfect – and can (E) germinate for six years while waiting.