When did things start to go wrong?

The choice that indicates when things started to go wrong is focused on the timing of Emily's arrival. The emphasis here is on a causal relationship—suggesting that the situation deteriorated immediately upon her arrival. This implies that her presence may have been a turning point that led to subsequent problems, indicating a direct connection between her arrival and the onset of difficulties.

This option highlights how the dynamics may have shifted due to Emily's involvement, suggesting that her actions or the mere fact of her being there instigated changes that resulted in negative outcomes. The other options either suggest that issues began earlier or later in relation to events not directly linked to Emily’s presence, which does not emphasize the impact she had at the specific moment of her arrival.