Formal approach is the best tone to use.
Hope this helped.
On the contrary: B) To compare
In addition: C) To add
For instance: A) To give an example
In conclusion: E) To summarize
Afterward: D) To show sequence or result
The object of the preposition would be ten o' clock.
Maybe b but could be d it’s your preference
Explanation:
Its jealousy if im not mistaken