Looking at the answer options:

'VOR, DME and waypoints' --> INCORRECT. VOR and DME use phonetic letters, but not waypoints which use 5 letters and are spoken as words.

'Aeroplane type' --> INCORRECT. You would just say the word 'Boeing', 'Airbus', 'Learjet' etc and not spell out the letters

'Radiotelephony designator' --> INCORRECT. Using British Airways as an example, their radio designator is 'Speedbird' and this is spoken as a word on the radio, and not spelt out.

'The designator for the automatic terminal information service (ATIS)' --> CORRECT. ATIS is always broadcast with a phonetic letter, which is associated with the current time period. A pilot would typically report having received 'Information D' (DELTA) for example.