The proposition here is - in. <span>A </span>preposition<span> is a word such as after, in, to, on, and with. </span>Prepositions<span> are usually used in front of nouns or pronouns and they show the relationship between the noun or pronoun and other words in a sentence.</span>
Answer:
spark notes is the best for this kinda thing
Explanation:

<h3><u>dear </u><u>maam </u><u>and </u><u>sir!</u></h3>
good day, today I apologize to you because I did not attend our class for 2 days because I was sick. I will make a way to catch up with our lessons, again sorry for not attending our class. Hope you understand it thanks
<h2><u>hope</u><u> it</u><u> helps</u></h2>
A B C and D they should all be capitalized
The third excerpt is structured correctly.