and is (30) ____________ in the iPhone X

Câu hỏi :

Read the following passage and mark the letter A, B, C, or D on your answer sheet to indicate the correct word or phrase that best fits each of the numbered blanks.
Face ID is a facial recognition system, designed and released by Apple Inc. and is (30) ____________ in the iPhone X. It was introduced on September 12, 2017 at the Steve Jobs Theater by Phil Schiller and Craig Federighi.
It is meant to replace Touch ID (31) ____________to add another security mechanism. It allows users to unlock iPhone X, make purchases in the various Apple digital media stores (the iTunes Store, the App Store, and the iBooks Store), and authenticate Apple Pay online or in apps.
Face ID works by projecting more than 30,000 infrared dots onto a face and producing a 3D facial map. Apple claimed the probability of someone (32) ____________unlocking a phone is 1 in 1,000,000 as opposed to Touch ID at 1 in 50,000. If the user's phone has been rebooted, has not been unlocked for 48 hours, or disabled by the user by (33) ____________"Emergency SOS", only the passcode can be used to unlock the device and not their face.
Apple has stated that facial recognition information is stored locally in a secure enclave on the Apple A11 Bionic chip and is not stored in the cloud. The system will also not work with eyes closed, preventing access (34) ____________unattended.