Final answer:
Without adequate information on interest rate and compounding frequency, the calculation of Candace's annual effective yield is not possible from the provided data.
Step-by-step explanation:
The question is asking for Candace's annual effective yield, which is a financial concept often discussed in math and business classes. To calculate an annual effective yield, we need additional information such as the interest rate, frequency of compounding, and any other conditions affecting the yield. The provided options suggest that Candace's yield should be expressed in percentage terms. However, the reference information given (percent yield calculations and various numerical examples) is not sufficient to calculate or identify Candace's annual effective yield, as it does not relate directly to any standard method for calculating yields; the information appears to be a collection of calculations from different scenarios. Therefore, we cannot select one of the given options (a, b, c, or d) as the main answer to the question without further relevant data.