Answer:
D. two independent clauses
Explanation:
This sentence consists of one independent clause, being “Architect David Foster has designed a skyscraper” and a dependent clause, being “in which each floor can rotate, creating dynamic shapes.” Thus, it does not have two independent clauses.
A clause is a group of words having a subject and a verb, it can be classified into independent, when the clause expresses a complete idea on its own and can stand alone as a full sentence, and dependent, when the clause does not express a complete thought on its own and thus, can not stand alone.
