Aplay tells a gritty , realistic story in a surprising way that defines convention in which literary era eas it most likely written a victorian b interregnum c elizabeth d modern

I’d say that correct answer is (D). Modern drama represents theatrical era starting from the 19th  to 20th century which is at the beginning characterized with realistic settings and characters (naturalistic drama, Ibsen, Chekhov) and by the end with anti-realism (avant-garde, Beckett, Ionesco). This period is quite divers and one of the characteristic is that modern drama is a play tells a gritty , realistic story in a surprising way that defines convention in which literary era it was most likely written, such as plays written by Ionesco (for example “Lesson”). 

d bc i just guessed