The Correct Answer is Option 'D'

Explanation:
To understand why the correct answer is option 'D', let's analyze the given information and evaluate each option.

a) This option is incorrect because it only provides a comma (,) after the word '_____'. This does not make any sense grammatically or in the context of the question. It is not a complete sentence or a valid answer option.

b) This option is incorrect because it only provides a comma (,) after the word '_____'. Similar to option 'a', it does not make any sense and is not a valid answer option.

c) This option is incorrect because it only provides a comma (,) after the word '_____'. Again, similar to options 'a' and 'b', it does not make any sense and is not a valid answer option.

d) This option is correct because it provides a complete sentence that makes sense in the given context. The comma (,) after the word '_____' indicates that there is more information to follow. The sentence structure suggests that the answer or explanation is yet to be provided after the comma. This is a common way to present multiple-choice questions, where the answer or explanation is given after the comma.

Therefore, the correct answer is option 'D' because it provides a grammatically correct and contextually relevant sentence structure, indicating that there is more information to follow after the comma.

Summary:
In summary, option 'D' is the correct answer because it provides a complete sentence structure that makes sense in the context of the given question. The comma (,) after the word '_____' indicates that there is more information or an explanation to follow. Options 'a', 'b', and 'c' are incorrect as they do not provide a valid or meaningful sentence structure.