what is one reason two countries may sign a treaty to create a direct agreement with one another?to…

Brief Explanations:

Treaties between countries are often economic agreements to support trade; limiting competition for domestic firms via restricting rival companies' trade access is a valid direct treaty goal. The other options are incorrect: trade barriers/limiting trade are not typical positive treaty aims, and tax policy is usually domestic, not a cross-border treaty focus.

Answer:

to limit trade opportunities for competing companies