Answer: The addition of able turns them into adjectives
Explanation: Noticeable- it becomes an adjective, describing something that can be easilt seen.
Believable- it also becomes an adjective, describing omething that can be easily believed or credible.
The correct answer is "She doesn't need help". The reason why it's so is because the word doesn't is for singular purposes, and the subject in question is a single person only - which is "she". Therefore, it's a Standard English language that's in use as a sentence.