Les internautes les sites d’Internet...par exemple…

What command is suggested by le livre

Which verb phrase correctly completes this sentence?               valérie lit un roman a. et voyager b. voyageant c. en voyage d. en voyageant

Could anybody translate this into french i would be grateful: imagine being on top of the great wall of china meating all these new people seeing how the locals live.and how's your holiday going in frence? i hope everything is fine,see you soon.