A subscription can be scheduled using an advanced cron expression is correct.

This is correct because Jira Cloud lets you schedule filter subscriptions using cron style expressions so you can define complex recurring schedules for when the filter should run and send emails to recipients.

You can specify more than one Jira group as recipients for a single subscription is incorrect because a filter subscription does not allow selecting multiple groups as recipients in a single subscription entry in the way that option suggests.

A subscription will never send an email if the saved filter returns no issues is incorrect because subscriptions can still run according to their schedule and may send notifications that report zero matching issues depending on the subscription configuration and implementation.

A project role can be chosen as a recipient for filter subscription notifications is incorrect because project roles are not accepted as direct recipient targets for filter subscriptions in Jira Cloud in the same way individual users or groups are.

A user does not need Browse Projects permission to create a subscription is incorrect because creating and receiving meaningful filter subscription results depends on the user having appropriate permissions to view the projects and issues returned by the saved filter.

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