<span>When I first beheld this apparition—for I could scarcely regard it as less—my wonder and my terror were extreme.”</span>
I believe it is an Idiom. Are there options to choose from?
B. Sentence 1 is a run-on
Grandma had a beautiful, eight-piece antique canister set on her countertop. Painted on the sides and top of each piece were pink, blue, and yellow flowers.
It could be made into two sentences, as seen above.