Go for b (filler: jdjdmfmrnnfmfjxjdk)
Answer:
I believe it sounds perfect just as it is 10/10 and no your grammar is okay and it has a decent flow
Answer:
This is what I would write:
My dearest journal, I'm confiding in you because what I am about to say is something I can tell no one. Soon, I will have to leave behind my friends, the people I would do dumb things with on occasion that we had nothing else to occupy our time, as well as my family, the individuals who have seen me grow and change since birth. I don't know what lies ahead for me but I know that I will miss both groups immensely as they were my foundation and I will soon have to start fresh. What I would give to express to them how much they mean, how much they meant- if only I could do that.
Explanation:
I provided this with no knowledge of the supposed 'absence' that the writer/author of the entry is supposed to be taking but I hope it helps!

The doctors did all they could, but he finally
cancer.
The correct answer will be option A because here in the question they have indicated about the death of the person. The other options (asked for, fell back into & came into) are not fitting for this question. So, the correct answer is <u>A.</u><u> </u><u>died </u><u>of </u>(✓).
______
Hope it helps.
RainbowSalt2222