You are a computer consultant called in to a manufacturing plant. The plant engineer needs a system to control their assembly line that includes robotic arms and conveyors. Many sensors are used and precise timing is required to manufacture the product. Of the following choices, which OS would you recommend to be used on the computing system that controls the assembly line and why?

a$.$ IOS $4$ because it is multitasking

b$.$ MS$-$DOS because it is single$-$tasking

c$.$ LynxOS because it is an RTOS

d$.$ Windows Server $2019$ because it is multiuser