Which statement about Tule geese migration timing is supported by the material?

• A. It generally takes about two weeks.
• B. It generally takes about four days.
• C. It cannot be estimated at all.
• D. It happens instantly.

Answer: (B)

Migration timing asks how long Tule geese take to complete their journey from breeding to wintering grounds. The material states this duration is around four days, so the movement is swift but not instantaneous, including flight and any brief rest or refueling stops. This makes the statement that it generally takes about four days the best match to the observed data. The other options don’t fit because two weeks would indicate a much longer trip than described, claiming it cannot be estimated ignores the given figure, and saying it happens instantly contradicts how birds migrate in reality, since they need time to fly and rest.