I feel B is the complex, compound sentence... I regret I cannot tell you why.
The answer would be:
The biography uses a chronological structure; "Marian Anderson Sings" uses flashbacks to narrate the events.
<span>i will help you but can u give me more of what type of answer you want</span>
From 1861-1865 was the American Civil War. Because Winchester's guns were so easy to reload and fire quickly, they were very popular with the soldiers of the North. In times of war, weapon manufacturers tend to make a lot of money because their products are in high demand.