各位童鞋，求问下36套一道短阅读

IanCanUID: 3446519

Excavations at a Mayan site have uncovered jewelry
workshops located some distance from the center of the
site on roads radiating outward from the center. Since the
nobility lived only in the area of the center, archaeologists
conclude that these workshops made jewelry, not for the
nobility, but for a middle class that must have been
prosperous enough to afford it.

1. The archaeologists' argument assumes which of the
following about the artisans who worked in the
workshops'
按这个问法，这道题算逻辑题吗？求assumption？
定位应该在最后一句，archaeologists conclude that ....
但是这个是conclusion吧 ? 会是assumption吗？纠结.....

(A) They were themselves prosperous members of a
middle class.
(B) They lived near their workshops.
(C) Their products were not made from the same
materials as was jewelry for the nobility.
(D) They worked full-time at making jewelry and did
not engage in farming
(E) They did not take the jewelry they had made in
the workshops to clients who were members of
the nobility.