18. Which statement is TRUE about structure chart technique during design? A. It is a singular and bottom-up design approach that partitions system structures into modules. B. It is recommended to design the highly coupled and highly independent modules because it allows system to be maintained easily. C. It is recommended to design the highly independent and loosely coupled modules because it allows system to be maintained easily. D. It is recommended to design the loosely coupled and less cohesive modules because it allows system to be maintained easily