A.\(\left| {a + b} \right| = \left| a \right| + \left| b \right|\)
B.\(\left| {a + b} \right| \le \left| a \right| + \left| b \right|\)
C.\(\left| {a + b} \right| < \left| a \right| + \left| b \right|\)
D.\(\left| {a + b} \right| > \left| a \right| + \left| b \right|\)