Which of the followitie statemithits ate trife?

Cost behevior io considered curnillimear whien iever a strathethe litue is a reasonable approximation for the relation between cost anid activity

$2$ As activity decreases with in the relevantit range, fixed costs remain constant on a per unit besis.

In accounit analysis, an accounit is classiffed as either variable or fixed based on an analyst's prior knowledge of how the cost in the sccoutit bethaves.