Which of the following is a main difference between the spiral search pattern and the grid search pattern?

$$ A$.$ The spiral search pattern has people performing line searches, while the grid search pattern has people performing circular searches.

B$.$ The spiral search pattern divides the crime scene into zones, while the grid search pattern views the scene as one big zone.

$$ C$.$ The spiral search pattern is very thorough, while using the grid search pattern could lead to some of the evidence being missed.

$$ D$.$ The spiral search pattern employs one person, while the grid search pattern employs two people.