THIS USER ASKED πŸ‘‡

The results of creating a more cohesive political confederacy for the iroquois included

THIS IS THE BEST ANSWER πŸ‘‡

I think the answer to letter D. is population decline as competition over resources increased.

Many Iroquois lost their lands to American colonists and were at constant war among their territories. This resulted in a population decline for the indigenous settlers and an increase in the population among the Colonists.