Here the issue is about parallelism in a comparison. All the choices except C compare the subject Comet with its s return. This is wrong. The use of the preposition ‘in’ comprises the parallelism part of the issue.
The actual correct sentence will run as follows.
In no other historical sighting did Halley’s Comet cause such a worldwide sensation as in its return of 1910-1911
Note the ‘in’ at the beginning of the sentence that matches with ‘in’ of the in its return.
The actual correct sentence will run as follows.
In no other historical sighting did Halley’s Comet cause such a worldwide sensation as in its return of 1910-1911
Note the ‘in’ at the beginning of the sentence that matches with ‘in’ of the in its return.
