Solve this problem if the recorder point is 250 units the lead time is 2 months and the average monthly rate of counsel consumption is 75 units than the minimum balance is blank units what is the answer

The answer i think is d

Except common history

Historians are researchers of the past or people who understand the history of people. with this field, they must possess qualities such as being unbiased, patient, efficient reader, has a knack for logic and critical thinking and reasoning, disciplined, open-minded, resourceful, with good analytical ability, good reasoning skills and problem solving!

Wheres the answers to the question