It Is Week 1 and There Are Currently 20 as in Stock

Multiple Choice

It is week 1 and there are currently 20 As in stock. We need 300 As at the start of week 5. If there are scheduled receipts planned for week 3 and week 4 of 120 As each and A has a lead time of 2 weeks, when and how large of an order should be placed to meet the requirement of 300 As?

A) Week 1, 300 As
B) Week 3, 40 As
C) Week 5, 40 As
D) Week 4, 40 As
E) Week 4, 300 As