Which one of the following statements is correct concerning U$.$S$.$ Treasury bill rates for the period $1800$ to $2010?$

Multiple Choice

T$-$bill rates never exceeded $10\%.$

T$-$bill rates never exceeded T$-$bond rates.

T$-$bill rates were lower than $1\%$ for a period of time.

T$-$bill rates were less volatile than T$-$bond rates.

T$-$bill rates were the highest during the World War II years.