Answer:
A. Cursor.
Explanation:
If you read the answer choices carefully, none of them fit in with the "flashing symbol" category, even though some of them might allow you to input text. However, you have used a computer before to type out text, just like how you typed this question to Brainly. Therefore, you should also know how a cursor acts. It flashes and allows you to input text as well.
Therefore, A is the correct answer to this question.
Hope this helped!
~Jinachi~
