Repetition: Allows the audience to understand the message of the text because it is repeated.
So,
The sentence is: "Once she left the store, my mother realizes she forgot her purse on the counter."
The phrase "One she left the store" is in the past tense.
In the next phrase, "my mother realizes", the tense shifts to present.
In the final phrase, "she forgot her purse on the counter", the verb tense shifts back to the past tense.
Therefore, option A is correct.
I believe the answer is <span>obsession with the past
in the novel, Ahab is depicted as the only character that do not grow throughout the story due to his single-minded obsession.
He stabbed his first whale when he was eighteen years old and yet still obsessed until he's almost 50.</span>