After the hellenistic civilization came to an end,
a(its achievements were wiped away by roman advancements.
b(it affected european arts and culture for thousands of years.
c(it came to represent the start of the classical era in greece.
d(its influence declined in egypt and across northern africa

The correct answer would be B - it affected European arts and culture for thousands of years. 

While the Hellenistic civilization itself did eventually extinguish in the form that existed at the time, Romans drew inspiration and knowledge from their civilization for a lot of things and for an extended period. 

Furthermore, the achievements and the civilization itself inspired many artists, writers, poets, etc. in the following centuries that based their work on the ideas and stories of the Hellenistic civilization.