Answer:
B. He earned a lower interest rate than he expected.
Explanation:
Phillippe's expectation from his investment of $1,000 ten years ago was shortened to $1,680, instead of $1,800. $1,800 was expected based on the interest rate he was given. But, unfortunately, he earned a lower interest rate than he expected. This made him have $680 more on his investment of $1,000 after 10 years.