three free credit report

Sally, age 30 (unemployed, welfare recipient getting $2,500 per month in support; Reason for moving: lower rent at your complex; Number of people: two [Sally and child] Bad credit)

Andy, age 28 (self employed, wage $3,600 per month, verbal statement from Andy; new to area; number of people: 2 [friend will arrive later]; No credit report yet.)

Jack and Jill, both age 40 (Employment: only Jill employed, City Employee, wage is $6,000 per month [has pay stub]; Reason for moving: larger apartment; Number of people: 5 [Jack, Jill and three children]; Credit Report: Late payments on several accounts)

Charlie, age 35 (Employment: Lockheed Martin, wage is $5,000 per month, unverified; reason for moving: does not like present property manager; Number of people: one; Bad credit and bankruptcy)

Which one should I rent to and why?
The rental rate is $1,200 for a one bedroom.

Heidi