The answer is "Te recomiendo que".
What Carlos is saying is "I don't know what type of bank account to open for saving my money".
Julio can start his response with three options. "I recommend you to..", "In case of...", "It is true that...", or "Unless that..."
And then Julio follows with "...open a savings account".
Clearly the answer is "I recommend you to" which means "Te recomiendo que".