Answer:
I believe its B it makes the most sense
Teachers should write a formal letter to welcome the parent or guardian
Answer:
D
Explanation:
A isn't really mentioned or stated directly in the paragraph, B is irrelevant, C would be the correct answer if the first sentence was relevant to it. It's D because the first sentence is the main idea of that paragraph and the main idea of the paragraph is what helps to add development to the essay.
it is usually when the event take its highest point such us the climax