Answer:
"It is very proud."
Explanation:
Proudy is not a word, the only words that contain <em>proud i</em>n them are proudly, prouder and the word proud itself
The appositive phrase in the given sentence is option A. a 40-foot metal construction. An appositive phrase consists of words that describes or renames the noun it precedes. The noun that the given appositive phrase renames is the word "purchase".