The correct option is D Pliny
Gaius Plinius Secundus, known as Pliny the Elder" 77 CE, left probably the most important account of trade between Rome and India. According to him, one documented consignment from Muziris to Alexandria consisted of 700-1,700 pounds of nard over 4,700 pounds of ivory and almost 790 pounds of textiles. This has been calculated as worth a total value of 131 talents, enough to purchase 2,400 acres of the best farmland in Egypt. With such staggering profits, it is little wonder that the Roman government in Egypt encouraged and profited by the trade. In this context, he said, "Gold is flowing out of the Roman Empire due to the excessive use of Indian goods." Therefore, the correct answer is (A).
Other options like Aristotle, Socrates and Plato are political thinkers nd Philosophers and have existed during the ancient period 600 BCE.