The correct answer to this open question is the following.
Although there are no options attached and further reference about the geographical place, we can comment on the following.
The way in that trade stayed the same in the 1450s was that it was conducted through the trans-Saharan through West Africa and other territories. It started to be different when merchants decided to take their products to other places and far regions to trade their products such as salt, ivory, gold, and silver. Later, Europeans started to demand more quantities of some raw materials and natural resources from West Africa and that is when this traditional trans-Saharan route started to change.
