Which of the Statements Below Does NOT Accurately Describe the Navigational

Which of the statements below does NOT accurately describe the navigational ability of homing in birds?

A) Homing pigeons have map sense, which most likely includes landmarks as well as olfactory and visual cues.
B) Homing pigeons use the sun and stars as well as the magnetic field to find their way "home" over long distances.
C) If a homing pigeon is fitted with a magnetic helmet, it would most likely not be able to find its way on a cloudy day.
D) If a homing pigeon is fitted with a magnetic helmet, it would most likely not be able to find its way on a cloudy day, but it would likely be able to navigate on a sunny day because it would still be able to use the sun as a compass.
E) A biological clock used for time cues is not necessary for a homing pigeon to use the sun compass.