WhatsApp has accused an Israeli spyware company of hacking 1,400 of its users, including journalists, human rights activists, and diplomatic officials. As new allegations emerge, Guardian US investigations correspondent Stephanie Kirchgaessner discusses how she first discovered the story. 

In October 2019, the encrypted messaging app WhatsApp filed a lawsuit against a little-known Israeli technology company called NSO Group. It accused the group of being responsible for a series of highly sophisticated cyber-attacks on 1,400 of its users. It was the latest twist in a saga that the Guardian‘s Stephanie Kirchgaessner had been investigating for months. 

She tells Anushka Asthana that after working with researchers at the Canadian firm Citizen Lab, which tracks the use of spyware, she believes current and former clients of NSO Group include Saudi Arabia, Bahrain, Kazakhstan, Morocco, Mexico and the United Arab Emirates. 

NSO Group however, argues that WhatsApp has ?conflated? the group‘s actions with the actions of its ?sovereign customers?. NSO Group says it licenses its signature spying technology, Pegasus, to government law enforcement and intelligence agencies and assists with ?training, setup, and installation?, but it does not operate the technology. As new allegations emerge about the way countries are using this technology, will further challenges be brought to the courts? 

Adapted from https://www.theguardian.com/technology/audio/2020/jun/22/is-spyware-technology-helping-governments-hack-phones

Choose the alternative that correctly substitutes the word saga in the sentence "It was the latest twist in a saga that..." (paragraph 2).