Which of these emerged as a major port city by end of the seventeenth century as a result of the colonial shipping industry

Another user wrote this:
" Philadelphia of these emerged as a major port city by end of the seventeenth century as a result of the colonial shipping industry is the correct answer about these American citis in the east coast."

If you know that this is then I hope it helps.

Hiladelphia of these emerged as a major port city by end of the seventeenth century as a result of the colonial shipping industry

What are they! i have no idea lol