Answer:
A
Explanation:
Meanwhile can be defined as the time before something happens or before something ends, it is another way to say "during this time".
Found one: <span> The great black forest--stern as it showed itself to those who brought the guilt and troubles of the world into its bosom--became the playmate of the lonely infant, as well as it knew how.</span>
B) The fearsome unstoppable dog barked at us viciously needs a comma after fearsome and before unstoppable