What can happen when international rivals compete against one another in multiple-country markets?

It will initiate a trade war between countries.

Explanation:

When international rivals compete in the multi-country or global market, they usually show aggressive behaviour that initiates trade war between them and the countries. In order to compete in the market and to compete against each other, the rivals show aggressive behaviour in terms of profit and cost margins that helps the buyers to buy commodities of good quality and at low prices.

if you do not file your taxes you will not have a job, and you credit rate will go down.

answercold,maybe nuclear war;