Option C Ian the correct answer because “SUBMERGE” is the right way to spell the word that means to drown or be pushed underneath something, hence it is correct.
Option A is incorrect because “awkward” is spelled correctly, it means to be uncomfortable.
Option B is incorrect because ‘submission’ is spelled correctly, it means the act of submitting something.
Option D is incorrect because ‘disappoint’ is spelled correctly, it means to fail the hopes of something.