PLZ help me this is due TODAY PLZ

Which of the following is an example of an iron triangle?

Enlightenment thinkers most contributed to the development of whichpolitical idea? a. religious leaders should play the largest role in establishing asociety's laws.b. democratic governments have the responsibility to protect humanrights.c. criminals must be punished harshly if a society is to maintainorder.d. written constitutions place unnecessary restrictions ongovernments' powers.

Why did alexander give the soldier who saved the hat band a reward? why did he then order the man's head cut off?