I have selected D but I agree that D is not perfect choice but better than C
C)Maps of the area reveal that the largest garbage dump in the area is located 3 miles inland from the lake.
Yes Hull birds could travel far in search of food and they could be eating food from garbage and is very possible for struggle for existence
D) Blood tests performed on the gulls reveal high levels of the types of fatty acids generally found only in human food.
If food is readily available in seashore than travelling
...
C)Maps of the area reveal that the largest garbage dump in the area is located 3 miles inland from the lake.
Yes Hull birds could travel far in search of food and they could be eating food from garbage and is very possible for struggle for existence
D) Blood tests performed on the gulls reveal high levels of the types of fatty acids generally found only in human food.
If food is readily available in seashore than travelling
...
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