C.
EXPLANATION
Mainland Greece is a mountainous land almost completely surrounded by the Mediterranean Sea. Greece has more than 1400 islands. The country has mild winters and long, hot and dry summers. The ancient Greeks were a seafaring people.
-http://www.ancientgreece.co.uk/geography/home_set.html
.Continental plates are thicker
.Rocks are older in continental plates
.Oceanic plates are denser
Answer:
I think the answer is D. red and green