Ehich was an important aspect of the sparks expedition in 1806? a) the native tribes would not be friendly towards future expeditions. b) the spanish were serious about preventing american expeditions in the region. c) oklahoma should be a part of indiana territory. d) oklahoma was not worth exploring.

B) The Spanish were serious about preventing American Expeditions in the region.

Explanation:

The Sparks Expedition, also known as the Freeman-Custis Expedition or Red River Expedition was a scientific expedition that explored the Southwestern United States. The purpose of it was to explore the Red River from the Mississippi River with the hope of finding a possible trading route to Santa Fe. It also wanted to collect scientific information on flora and fauna, and plan possible settlements. We know that the Spanish wanted to prevent American expeditions in the region because the Spanish officials intercepted the expedition in northeastern Texas, forcing the explorers to go back.