Final answer:
The question does not provide enough information to answer how long Olivia plans to reject all proposals of marriage.
Step-by-step explanation:
The answer to the question is not provided in the given information. The amount of time Olivia plans to reject all proposals of marriage is not specified. Therefore, there is no correct answer among the options A) four years, B) seven years, C) one year, and D) six years. The question requires additional information to determine the length of time Olivia plans to reject proposals of marriage.