Which one of the following statements is TRUE about every

A | If the trace of the matrix is positive and the determinant of the matrix is negative, at least one of its eigenvalues is negative. |

B | If the trace of the matrix is positive, all its eigenvalues are positive. |

C | If the determinant of the matrix is positive, all its eigenvalues are positive. |

D | If the product of the trace and determinant of the matrix is positive, all its eigenvalues are positive. |