The word closest in meaning to copious is b - plentiful.
Copious is synonyms to bountiful and bountiful means abundance, plenty, overflowing and never lacking anything. The other choices are really different since all of it has the common ground in meaning which is opposite to the given word.
I think your best choice would be a, but it can very well be d.
Answer:
I love this quote
"There are hundreds of languages around the world,
but a smile speaks them all."
Explanation:
Answer:
The big dog ferociously barked at the cat trembling with fear