How would you write this condition in a product rule?

In a Configurable Product, there is a requirement to disallow some attributes if the value of attribute ‘’Number of users’’ equal to or greater than 100, and less than 1000.

How would you write this condition in a product rule? Note: There are 2 correct answers to this question.
A . [AND] ([GEQ] (<*Value (Number of user)*>, 100), [LT] (<*Value (Number of users)*>, 1000))
B . [IN] (<*Value (Number of user)*>, 100, 1000)
C . [OR] ([GEQ] <*Value (Number of user)*>, 100), [LT] (<*Value (Number of users)*>, 1000))
D . [INR](<*Value (Number of user)*>, 100,999)

Answer: A,D