Read each sentence carefully to check whether there is any grammatical error involving verbs; the error, if any, will be in one part of the sentence. Select the option that corresponds to the part containing the error. If the sentence is grammatically correct as it is, select (5) "No error" as your answer. The means of communication (a)/ available to us have changed drastically (b)/ in the last two decades (c) / of technological advancement (d)/ No error (e)