Final answer:
B. Arianna feels that she has put some effort into her appearance is the most subjective statement.
Step-by-step explanation:
The most subjective statement among the given options is B. Arianna feels that she has put some effort into her appearance.
Subjective statements express personal opinions or beliefs, and they cannot be proven or disproven. In this sentence, Arianna's feeling about her appearance is based on her own perception and cannot be objectively measured or verified.
On the other hand, sentence A is an objective statement that can be verified. It provides a specific action (Arianna waking up an hour early) that can be observed or confirmed.
Learn more about Subjective vs. Objective Statements