Final answer:
The misspelled word is 'acidental'; the correct spelling is 'accidental'. Utilize spell checkers and familiarity with common words to reduce spelling errors.
Step-by-step explanation:
The word that is misspelled among the choices provided is b) acidental. The correct spelling of this word is 'accidental'. When trying to avoid spelling errors, one can utilize several strategies, such as becoming familiar with commonly used words, double checking with a spell checker, and if uncertain, using a different word that you are more confident about. Knowing the correct spelling can significantly reduce the number of mistakes in your writing and can help to improve grades.