GWD-3Q20

WW200730010062

GWD3-Q20:
Shipping Clerk:  The five specially ordered shipments sent out last week were sent out on Thursday.  Last week, all of the shipments that were sent out on Friday consisted entirely of building supplies, and the shipping department then closed for the weekend.  Four shipments were sent to Truax Construction last week, only three of which consisted of building supplies.
If the shipping clerk’s statements are true, which of the following must also be true?
A.    At least one of the shipments sent to Truax Construction last week was specially ordered.
B.    At least one of last week’s specially ordered shipments did not consist of building supplies.
C.    At least one of the shipments sent to Truax Construction was not sent out on Thursday of last week.
D.    At least one of the shipments that were sent out on Friday of last week was sent to Truax Construction.
E.    At least one of the shipments sent to Truax Construction last week was sent out before Friday.
答案选E，不明白，题目有点绕……跪求指教。谢谢！

Souref

Last week, all of the shipments that were sent out on Friday consisted entirely of building supplies
Four shipments were sent to Truax Construction last week, only three of which consisted of building supplies.

只看这两句话就明白E为什么对了，眼睛锁定building supplies。