suppose you have a rule to buy euros once the 50-day average of euros crosses the 200-day average over a period of five minutes and to exit otherwise. What would happen if the euro rate crosses the 50-day average and lasts in the 200-day average for a period of three minutes?

a. the trade is executed successfully

b. the trade is exited

c. the automated system takes no action.

d. an alert is broadcast for further instructions

no explanation is needed, only the correct answer. It's urgent.