The range of values of a and b for which the linear time invariant system with impulse response. h(n) = an n ≥ 0         = bn n < 0 will be stable if

• A. |a| > 1, |b| > 1
• B. |a| < 1, |b| < 1
• C. |a| < 1, |b| > 1
• D. |a| > 1, |b| < 1