Select the most appropriate option to fill in blank no. 1
Show answer & explanation
Correct answer: A
Explanation
The correct answer is option 1 i.e. frustrating.
Frustrating means causing annoyance or disappointment due to an inability to achieve something.
The phrase "instead of being able to finish the task at hand" suggests an obstacle preventing success, which naturally leads to frustration.
The sentence structure implies an unpleasant feeling when one's focus is lost, making "frustrating" the most suitable choice.