Final answer:
Experiencing a romantic breakup can lower individuals' self-esteem, but this effect disappears after several months.
Step-by-step explanation:
In a recent large-scale study, experiencing a romantic breakup lowered individuals' self-esteem, but the effect disappeared after several months.
The study found that immediately after the breakup, individuals' self-esteem was significantly lower compared to before the breakup. However, over time, their self-esteem gradually improved and returned to pre-breakup levels after several months.
Therefore, the correct answer is d) After several months.