Question

in the use of transitions, which of the following is formal?
in the end
finally
in the meantime
in a nutshell

Explanation:

"Finally" is a commonly - used formal transition word. "In the end" can be used in both formal and informal contexts but is more colloquial in some cases. "In the meantime" is used to refer to an interval of time and is not a concluding formal transition. "In a nutshell" is an informal way to summarize.

Answer:

B. Finally