There is a sentence that is missing in the paragraph below. Look at the paragraph and decide where (option 1, 2, 3, or 4) the following sentence would best fit.

Sentence: The scandal exploded when whistleblower Christopher Wylie detailed how this data was leveraged to influence political campaigns, notably the 2016 U.S. presidential election and Brexit referendum

Facebook’s reputation suffered massive damage after revelations emerged that Cambridge Analytica, a British consulting firm, had harvested personal data from millions of users without consent.__1__ . Public outrage followed, leading to intense scrutiny of Facebook’s privacy practices and CEO Mark Zuckerberg’s testimony before Congress.__2__. Regulators worldwide initiated investigations, prompting widespread discussions about privacy, surveillance capitalism, and ethical technology use.__3__. Ultimately, the scandal reshaped public awareness about personal data protection and accountability in the digital era.__4__.