You noted that you believe D was a better answer so I will start there. I originally chose D under timed conditions as well but as I am reviewing I believe I see why D is wrong.
D states " long-term peaceful association....was an important PRECONDITION for the use of wampum as a means of COMMUNICATION."
I believe this is wrong because wampum was established as a means of communication multiple times prior to this haudenosuane confederacy(see lines 21-21 where it "represents basic ideas" aka communicates basic ideas. Also lines 34-36 where it says wampum string was used to send simple political messages) It is not until after these uses of wampum were already around that the long term peaceful association of the haudenosaune confederacy came about therefore it could not be a pre-condition for the use of wampum as a means of communication. If anything those long standing uses of wampum were a precondition of the wampum belts(which is what question 17 says basically.)
Now for why I finally settled on E being right. I originally focused my search on line 5-7 I realized this was the wrong place to look and focused on the last paragraph instead. Line 49 when explaining longhouses uses the word "usually"...line 50 uses the word "possibly"...and line 53 uses the phrase "lines between human-like figures SEEM to have indicated..." The deliberate usage of what I consider qualifier words indicates to me that they are not conclusive. Think of it this way for example, if you were to discover that contrary to line 53, lines between human-like figures indicated that it was going to rain cats and dogs, the author would reply "well it only SEEMED to indicate the current state of affairs...I never said it for sure did." So thinking of it that way illustrates that the interpretations are not CONCLUSIVE but rather they think they are right but not sure.
Hopefully I helped and if I am misguided in my interpretations of the answers anyone reading this feel free to correct me. I created an account just so I could answer your question after months of using the forum...
