Which strategic initiative was most crucial to Target's successful brand recovery following its massive 2013 data breach?

In 2013, Target faced one of the most devastating retail data breaches in history, affecting 41 million customer payment card accounts and exposing 70 million customers' personal information. Many retail analysts predicted the brand might never fully recover from such a massive breach of customer trust. Yet within a few years, Target managed an impressive turnaround. This trivia question explores a key strategic initiative that helped Target rebuild its brand and regain customer confidence.

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The $18.5 billion investment in store redesigns and private label brands launched in 2017
The acquisition of delivery service Shipt for $550 million to compete with Amazon Prime
The introduction of the Target Circle loyalty program that replaced the REDcard rewards system
The partnership with Apple to create dedicated mini-stores within Target locations