Final answer:
A T-Bill is characterized by being issued at a discount, having a minimum denomination of $10,000, and maturities of less than one year, not up to two years nor with a $1,000 denomination.
Step-by-step explanation:
A T-Bill, or Treasury Bill, is characterized by several distinct features, but the correct characterization includes that it is issued at a discount and it is in book-entry form. However, one of the options provided in the question does not accurately describe a T-Bill. Specifically, the statement that maturities are up to two years is not correct for a T-Bill. Treasury Bills have maturities of 13, 26, or 52 weeks, which is less than one year. Moreover, the minimum denomination for a T-Bill is not $1,000, but rather $10,000. Thus, both options 'b' (it has a $1,000 minimum denomination) and 'c' (maturities are up to two years) are incorrect.