Answer:
E) Marco, Tammy, and Juan
Step-by-step explanation:
In order to be able to file as head of household, you must pay for 50% or more of the household expenses, not be married, and you must also have at least one qualifying child or dependent.
Marco, Tammy and Juan all pay for the household expenses, they are not married (Juan's wife left him), and they all have at least one dependent: Marco takes care of his mother, Tammy of her brother and Juan of his son.