Answer:
Hyperbole
Step-by-step explanation:
A hyperbole is an exaggeration, and the phrase "a million times" is exaggerated in this sentence. To check, let's use process of elimination.
A: A simile is an exaggerated comparison using like or as. Example: "Her voice is like nails on a chalkboard."
B: Personification is giving human traits to non-human things. Example: "The soothing breeze whispered in my ear to stay, and I knew I would follow her advice."
D: Symbolism is when an object represents something else. Example: Doves symbolize peace, roses symbolize love, etc.
Therefore, hyperbole is the only applicable answer.