Answer:
Option a is the correct answer.
Explanation:
In an MS-WORD Document, when the user wants to write some line with the help of bullets or numbers then he needs to press enter when he had completed the first line and wants to proceed for the second line.
The question scenario also suggests the same which is described above. Hence Enter will fill the blank of the question statement. Hence Option 'a' is the correct answer while the other is not because--