<span>Since 1848, the Rio Grande has marked the boundary between Mexico and the United States. It affected domestic policy in that the river had been a cause for a discord between the US and Mexico and special policies were implemented for the area.</span>
Answer:
(D) The method of investigation whereby one initiates a plurality of processes in endeavoring toward the eventual determination of a theory and/or hypothesis.
sorry if i'm wrong
<span>Okinawa had the most vital air base in the United States island hopping campaign</span>
Idk i thought it was in the mibble