Critical Reasoning

A certain retailer promotes merchandise by using the following policy:
At all times there is either a “manager’s sale” or a “holiday sale” or both going on. All sales are run for exactly one calendar month. In any given month, if a manager wishes to clear out particular line of merchandise, then a managers’ sale is declared. If a holiday falls within the calendar month and there is excess merchandise in the warehouse, then a holiday sale is declared.
However, there is no holiday that falls within the month of August and, in that month, the warehouse never contains excess merchandise.
Which one of the following can be concluded from the passage?
(A) If a holiday falls within a given month and there is no extra merchandise in the warehouse that month, then a holiday sale is declared.
(B) If a holiday sale is not being run, then it is the month of August.
(C) If a manger’s sale is being run in some month, then there is no excess merchandise in the warehouse in that month.
(D) If there is not a manger’s sale being run some month, then there is holiday sale being run in that month.
(E) If there is no excess merchandise in the warehouse, then it is the month of August.

Is it B?

I think its D
B there could be other month which have no holiday
None of the others can be concluded

I agree that the answer is D-it is the only piece of information from the original which can definitively be concluded. The passage states that at all time there is a sale going on on the other or both.

Yes,Its D,I think I missed this option in a hurry !

Yes, it is D.

I still feel D should be the answer.