A“bird’s foot” delta configuration, similar to that of the mississippi river delta, forms when the a. oceanic current exceeds the river current b. oceanic current is so strong that all sediment is removed as it arrives c. river and oceanic currents are equal d. river current exceeds the oceanic current

D. river current exceeds the oceanic current

Explanation:

The bird's foot delta type of deltas occur at places where the river current exceeds the oceanic current. This is the case with the Mississippi River and its delta. The current of the Mississippi River exceeds the currents from the Gulf of Mexico which are very weak. Because the currents of the Gulf of Mexico are very weak, the river is depositing lot of sediments at its final part. The accumulation of this sediment results in splitting up of the river in a triangular manner at its delta, giving it an appearance of the bird's foot, thus the name bird's foot delta.

the only other powers were germany russia and uk and they were too busy fighting each other wearing each other down   that the us was becoming strong and they were becoming weaker