Correct Answer: B
Explanation:
The presence of the word, ‘password’ in the sentence suggests that the missing word should be close to the word ‘identify’ in meaning. Out of all the given options, ‘recognize’ means the same as ‘identify’. ‘Defeat’ and ‘overcome’ mean the same but they are irrelevant in the context of the usage of the missing word. Therefore, B and D are the correct answers.