The error is a mistake in tenses. Turning is a present tense while was is a past tense...If you wanted to correct this, you might say...
As I turned the corner, the post office was on my right.
Hope this helps!
Would love brainliest trying to get to expert today thanks!
Im pretty sure its A and D. Because both set the mood of the story right from the start, climax would not set the first impression as it comes deep into the story.