"It is worthy to be observed, that there is not a year but it costs our state [Rome] to furnish into India, 500,000 sesterces [Roman unit of currency]. For which the Indians send back merchandise, which at Rome is sold for a hundred times as much as it cost."
From: Pliny the Elder, Natural History, Book VII.

What does this quote from Pliny imply about the reasons that Romans traded with India?

A)Goods from India were worth the same amount in both India and Rome
B)Indians wanted Roman-made goods
C)Goods that could be purchased cheaply from India were very valuable in Rome
D)Romans were probably trading for things in India that were also available in Rome