Question

Identify the complex sentence (IC+DC)

Answer 1

The correct answer would be B, since complex sentences have 1 independent variable and one dependent variable.

The dependent variable would be: Everytime he hears a siren
Why? Because it is not a complete thought.

The independent variable would be: My dog howls loudly.
Why? This statement is a complete thought.

A would be a compound sentence
C would be a simple sentence
D would be compound complex.

Hope I could help!