Directions: In the sentence given below, one/some parts have errors and others are correct. Find out which part has an error and mark it as your answer. If there is no error, mark 'No error' as your answer.

Finally, as research reveals new possibilities of the virus/ (A) transmission being airborne, masks everywhere are/ (B) very essential. Both the US and India suffer because of/ (C)continued failure to adopt the mask culture of countries like Taiwan./ (D)