Which one of the following statements is TRUE?

Which one of the following statements is TRUE?A.When using floating-point notation,we usually use a bit to store the radix point.B.When two’s complement notation is used to represent numeric values,a circuit for addition combined with a circuit for negating a value is sufficient for solving both addition and subtraction problems.C.All decimal numbers can be represented exactly using binary notation.D.When representing very small fractions,the problem of overflow may occur这是计算机导论的英文题目。