Step 1: Understanding the Concept:
This sentence equivalence question is built on a contrast between appearance and reality. The word for the blank must describe the true nature of Dickinson's method, which is the opposite of the "simple-mindedness" that critics perceived.
Step 2: Detailed Explanation:
The key phrases are "mistook" and "in fact." The critics were wrong. What appeared to be "simple-mindedness" and "artlessness" was actually a "constructed" surface. The act of constructing something to look artless requires skill, deliberation, and cleverness. Therefore, the blank needs words that mean "skill" or "cleverness."
Analyzing the Options:
(B) craft: This word means skill and expertise in an artistic practice. To construct something with craft implies great skill and intention, which directly contradicts the idea of simple-mindedness.
(C) cunning: This word means having skill in achieving one's ends, often by deceit. Since Dickinson's "artlessness" was a constructed illusion, "cunning" fits well, highlighting the deceptive skill involved.
The other options are incorrect:
(A) astonishment / (F) vexation: These are emotions and do not describe a quality of construction.
(D) innocence / (E) naïveté: These words describe the very qualities the critics mistakenly saw. They are the opposite of what is needed to describe how the surface was constructed.
Step 3: Final Answer:
Both "craft" and "cunning" describe the high level of skill and deliberate artistry Dickinson used to create a surface that appeared simple, fitting the sentence's contrast between perception and reality.