CAT QUESTION
The health commissioner said that the government had implemented strict measures to eradicate the contaminated food and, despite the recent illnesses, it will try to prevent the outbreak from recurring in the future.
it will try
that it tried
it had tried
it would have tried
that it would try
EXPLANATION
In the original sentence, the verb "had implemented" is in the past perfect tense, indicating that this event occurred at some point before the commissioner spoke. The verb "will try", however, is in the simple future. When the future is indicated from the point of view of the past, the simple future is not used. Instead, the conditional is required. For example, "The man said that he would buy a new car" is preferable to "The man said that he will buy a new car." We need to find a conditional verb. Moreover, the pronoun "it" begins a new clause and thus requires repetition of "that" in order to make clear, using parallel structure, that this new clause is still something that the commissioner said. For example, "The man said that he would buy a new car and that he would drive it everywhere" is preferable to "The man said that he would buy a new car and he would drive it everywhere."
Can I apply the same logic for the below OG question and choose could (D) - Also is there a rationale behind using conditional when the tense is past/past present
OG QUESTION
[Deleted because this question is from a banned source - see below.]