Directions: Fill in the blank in the following sentence with the correct alternative:
I did not inform ________ at all.

The sentence already contains the negative modifier "did not". In English grammar, using two negatives in the same clause is incorrect (double negative rule). Therefore, choosing negative words like none or nobody is incorrect.
The indefinite pronoun anybody is used in negative sentences, making it the correct choice to complete the phrase: "I did not inform anybody at all."