How will Iran retaliate to Soleimani killing?

From mobilising its allies in the Middle East to blocking shipping in a strategic waterway or even launching a cyber attack far beyond its borders, Iran has no shortage of options to avenge the killing of top commander Qasem Soleimani by its arch foe the United States.Tehran's clerical leadership promised "severe vengeance... in the right place and time," but is nonetheless expected to carefully weigh the dangers of retaliation to a regime that has been in place since the ousting of the pro-Amer