C or the third choice.
Hope this helps.
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.
Answer:
Affecting a tone of fatherly advice, Claudius declares that all fathers die, and all sons must lose their fathers. When a son loses a father, he is duty-bound to mourn, but to mourn for too long is unmanly and inappropriate.
