True or false the silk road actually consisted of more than one possible route through the mountains that the traders followed

This is true.

The Silk Road was not exactly a road: it was better said a network of Roads leading from China to the Mediterranean Sea.
It went through the very mountainous region of Asia, so a number of different routes existed that circumvented the mountains.

Answergranulation;

Answerwill have thinner; have thicker oceanic sediments;