Generally when a word ends with 's' already, we do not add an 's' to the word to make it plural, nor do we add an apostrophe (the symbol ') as that is used to show possession, not plural. This rules out Option C); and Option D) is incorrect as it is not even a word. But there is an exception here, and the correct answer is Option B). The word 'octopuses' is the specific plural for the singular form 'octopus' , making this an exceptional case where we add an 'es' after the word.