which of the following explains how we know the olmec expanded in mesoamerica

Question

a ) the maya told great stories of the goods they traded with the olmec
b ) olmec artifacts have been found throughout mesoamerica
c ) many exotic goods have been found in tres zapotes, proving trade with outher societies
d ) the olmec kept extensive trading recorda

Answer 1

b) Olmec artifacts have been found throughout Mesoamerica.