Parts C and E have errors, In part C, the phrasal verb 'locked in', which means 'shut someone into a room or space by locking or fastening a door, lid, etc.', is contextually irrelevant to the sentence and instead, the phrasal verb 'locked out' which means 'keep someone out of a room or building by locking the door' to indicate that FTX users are kept away from the usage of their crypto wallets is to be used. In part E, the modal verb 'should' which means 'used to indicate what is probable' is contextually incorrect, instead, the modal verb 'cannot' is to be used instead.
The correct sentence is: It is estimated that more than a million FTX users are locked out of their crypto wallets and cannot access their funds.
Hence, the correct answer is option (c).
Note:
Phrasal verb: A phrase that consists of a verb with a preposition or adverb or both, the meaning of which is different from the meaning of its separate parts. Example: She has always looked down on me. Here, the phrasal verb 'to look down on someone' doesn't mean that you are looking down from a higher place at someone who is below you; it means that you think that you are better than someone.
Modal verb: A verb used with another verb to express an idea such as a possibility that is not expressed by the main verb. The modal verbs in English are "can," "could," "may," "might," "must," "ought," "shall," "should," "will," and "would." They do not change their form (spelling) and they have no infinitive or participle (past/present). Example: I can speak Spanish. Here 'can' expresses the ability of the person to speak (main verb) Spanish. This ability cannot be expressed by the main verb 'speak'.
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