The TED Spread Is

The TED spread is:

A) the difference between a bbalibor rate for Eurodollars and the interest rate on a similar maturity Treasury security
B) a measurement of a Treasury security's maturity adjusted for the coupon rate
C) the difference between the interest rate on a Treasury security and Euribor's dollar rate
D) the difference between the interest rate on a Treasury security and the euro's domestic rate
E) None of these answers are correct.