Question

1. a complex sentence uses a ______ to connect ideas (clauses). *

proper noun
coordinating conjunction
subordinating conjunction
independent conjunction

Explanation:

A complex sentence has one independent clause and at least one dependent clause. Subordinating conjunctions are used to connect a dependent clause to an independent clause, showing the relationship between the ideas. Proper nouns are names of specific people, places, etc. Coordinating conjunctions connect equal - rank clauses (compound sentences). There is no such thing as an "independent conjunction".

Answer:

C. subordinating conjunction