Which two statements are true with regard to the information related in the text?
A) Imprinting meant that many peregrines remained within cities.
B) Imprinting is a controversial practice which has many detractors.
C) Imprinting largely failed as a strategy to help peregrines survive.
D) Imprinting was initially an effort to return peregrines to natural settings.
E) Imprinting has recently been adapted to try to induce peregrines to return to natural settings.