Final answer:
A nurse should expect to find emotional lability when assessing a client with borderline personality disorder.
Step-by-step explanation:
Borderline personality disorder (BPD) is characterized by a pattern of instability in emotions, self-image, and relationships. When assessing a client with BPD, a nurse should expect to find emotional lability, which refers to rapid and intense changes in mood. This can include frequent mood swings, anger outbursts, and emotional reactivity to events.
Self-sacrificing behaviors, indicated by option B, are more commonly associated with dependent personality disorder rather than BPD. Option C, being suspicious of others, may be seen in BPD, but it is not a defining characteristic of the disorder. Option D, grandiosity or an inflated sense of self-importance, is more commonly associated with narcissistic personality disorder.
Therefore, the correct answer is option A, emotional lability.