The article says:

Pirates sailed the high seas in the 1600s and 1700s. But pirate fashion wasn't recorded back then. So, artists mostly guessed what pirates wore. Their drawings now represent how people think pirates dressed.
The author uses this passage to help the reader understand __________.
A.how experts have learned about pirates
B.why pirates sailed on the high seas
C.why we don't really know what pirates looked like
D.how pirate fashion is different now than in the 1600s and 1700s

C. why we don't really know what pirates looked like