Sentence improvement – choose the correct temporal adverb with present perfect: replace 'has later recovered' with the idiomatic 'has since recovered' to show recovery after the shock.

Given sentence
'It was indeed a shock for her, but she has later recovered from it.'

Concept/Approach
When using the present perfect to show a change after a prior event, English prefers the adverb since: 'has since recovered'. 'Later/afterwards' typically pair with simple past or require different placement.

Step-by-step correction
Use: '… but she has since recovered from it.'

Why other options are weaker/wrong
'then/afterwards' → style and tense mismatch with present perfect; sound clumsy here.'No improvement' → keeps a non-idiomatic collocation.

Final Answer
since