Sentence 1: Nick needed to return the car his mother rented Monday morning. 
 Sentence 3: Nick called his coach who is old enough to return the rental with him 
 Sentence 4:  His coach said yes he would help him Monday morning to return the car 
 Sentence 5:  They both went together to return the car, Nick appreciated the help 
 Option 1: His mother forgot that she needed to work therefore can't go with him. 
 Option 2: His father agreed to accompany Nick so he could return the car.