B) Adverb - of place (after the object)
Ji-Li's aunt- humiliated by Red Guards because she refused to let children pick her mulberry leaves. Aunt Xi-Wen had to paste a da-zi-bao to her front door saying terrible things about her.
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!