Why Did Trade Along the Santa Fe Trail Begin to Flourish

Why did trade along the Santa Fe Trail begin to flourish after Mexico achieved its independence from Spain?

A) The Americans refused to trade with Spain.
B) The new Mexican government was more interested in trading with the U.S. than Spain had been.
C) British troops in the region prior to Mexican independence helped stifle trade.
D) The Indian raids that wreaked havoc on the trade during the era of Spanish control were eliminated.
E) Santa Fe was not established until after Mexican independence.