Final answer:
The answer to the given question is (d) no mistake, as all sentences are correctly spelled. It is essential to understand grammar rules and use a dictionary for spelling when correcting sentences and choosing the appropriate word.
Step-by-step explanation:
Correcting Sentences and Choosing the Right Word
From the given sentences provided, the exercise aims to test knowledge in spelling and correct use of words. The question asks to choose the sentence that contains a misspelled word. All the sentences given appear to be correctly spelled, so the answer should be (d) no mistake.
When reviewing the use of commas or selecting the appropriate word in a sentence, remember to consult the rules of grammar and use a dictionary for spelling. For instance:
In sentence 1, a comma is needed before the conjunction 'and' - I finally found my keys, and I got to work just in time.
For sentence 4, the missing comma after 'pizza' changes the list of items bought at the store - Though Susan wasn't feeling well, she went to the store anyway and bought ice cream, pizza, and candy.
Choosing the correct word requires understanding the context as well as grammar. For example, in sentence 3, the correct word is 'effect' as it is a noun indicating the result of the show on the student - This show always has a depressing effect on me.