Final answer:
Variances should be reported in physical terms or dollar amounts as promptly as feasible to be useful to managers.
Step-by-step explanation:
To be useful to managers, variances should be reported in physical terms or dollar amounts as promptly as feasible. This means that variances should be communicated as soon as possible and in a format that is easy to understand, either in physical terms (quantities) or dollar amounts. The specific time frame or threshold for reporting variances is not mentioned in the question, so options 1), 2), and 4) are not correct.