To make her language more formal and objective Rina could replace the word <u><em>scarier </em></u>for <u><em>more suspenseful</em></u>.
In formal language colloquialisms are usually not used, a colloquialism is a word normally used in spoken English, therefore, more terrifying, frightening or concerning would not be proper answers.
Meaning of suspenseful: Something that causes nervousness or excitement is going to happen or its result in uncertain.
C. sarcasm is stating something you may not mean in a "funny" or sarcastic way. <span />
Answer:
Kate this is u tell me plz baby