This Is a Certified Answer

Certified answers contain reliable, trustworthy information vouched for by a hand-picked team of experts. Brainly has millions of high quality answers, all of them carefully moderated by our most trusted community members, but certified answers are the finest of the finest.
I think the error is letter c because 'are' should rather be 'is' right? And it's because of the word neither. Neither isn't pertaining anything so it's singular that's why the linking verb 'are' should be replaced with the linking verb 'is'.