When was graffiti discovered and why?

the first grafiiti apeared on walls of caves and then greeks used it to write there names and protest poems on buildings .

i need  

the answer is letter b. false. fugue is a complex musical composition that does not occur or come together at the same time. in fact, it is composed of a number of voices or parts where the theme is introduced in one part and successively imitated in other parts.