In a Kanban Card Calculation Problem, Other Things Remaining the Same

In a kanban card calculation problem, other things remaining the same (that is changing only one variable at a time) . Select the most appropriate answer.

A) Number of kanban cards required will increase linearly as demand increases.
B) Number of kanban cards required will decrease linearly as demand increases.
C) Number of kanban cards required will decrease nonlinearly as the container size increases.
D) Number of kanban cards required will decrease linearly as the container size increases.
E) Number of kanban cards required will increase linearly as demand increases and number of kanban cards required will decrease nonlinearly as the container size increases.