Answer:
My little sister wants to work in television news when she grows up, because she says it's a way to affect people's lives.
Step-by-step explanation:
In grammar, the use of correct tenses, as well as the spellings and punctuation, are all part of the 'error detection and elimination' process. This means that a check in the spelling and punctuation used will ensure that any sentence is correct and constructed.
In the given original sentence, the spelling error is found in the word "its". Here, the word "its" should be replaced with "it's", referring to the "it is" in the contracted form. This is because the word "it is" refers to the act of working in the television news.
Thus, the correct answer is the third option.