In each of the following questions, a part of the sentence has been highlighted. You need to identify which of the given options can replace the highlighted part and make the sentence grammatically and contextually correct. In case the highlighted part is correct, mark option E as your answer. Flight cancellations and subsequent grinding of the top airline adversely impacted seat capacity in the domestic market which also resulted in fares going up.

The highlighted part is incorrect as 'grinding' is not suitable in the context of the sentence. 'Ground', as a verb, can mean 'prohibit or prevent (a pilot or an aircraft) from flying'. 'Grounding', the gerund form, should be used to make the sentence correct; so, A is incorrect. B is incorrect as 'subsequently' is an adverb and cannot qualify the noun (gerund) 'grounding'. We need to use 'subsequent' - an adjective - here. In D, the presence of 'in' is unnecessary and hence it cannot replace the highlighted part. Option C is the right answer.