Eurasian Reed Warblers Migrate Northeast During Spring

Multiple Choice

Eurasian reed warblers migrate northeast during spring. What evidence suggested that they were capable of bicoordinate navigation after individuals were captured and experimentally displaced 1000 km east during spring migration?

A) They began migrating to the west.
B) They continued migrating to the northeast.
C) They began migrating to the northwest.
D) They began migrating to the southwest.
E) They returned to their site of capture.