Why is this sentence ineffective?

"I have recently become qualified for this job. I was also a good worker at my last job."

A. It shows bias.

B. It uses a condescending tone.

C. It is too vague.

D. It is too descriptive.

The correct answer is option C. It is too vague.

Explanation:

The above sentence is ineffective because it is too vague. The reason is because it states some facts that do not entail anything. It does not say anything about how and for what have this person is qualified. And secondly it fails to explain the strengths and skills he portrayed and learned through the previous job due to which he was a good worker.

Therefore option C. It is too vague is the answer.