Which choice best replaces the underlined word? more terrifying more frightening more concerning more suspenseful

To make her language more formal and objective Rina could replace the word scarier for more suspenseful.

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.

Explanation:

the third option is best. I think