Answer:
The correct answer is "complex sentence"
Explanation:
A complex sentence is formed by an independant clause and a subordinate clause. In the example provided, the independant clause is "my nose runs constantly" and the subordinate clause is "when I get a cold".
The rest of the options do not apply since a simple sentence is formed by just an independant clause. A compound sentence is formed by two independant clauses joined by a semicolon or coordinating conjunction.
A compound-complex sentence is formed by 2 independant clauses and a subordinate one.
