Two routes to China included: A an all-water route to India B a land route across China a combination land andC water route

B.  an all-water route to India

C.  a combination of land and water route

Explanation:

Basically, the two routes to China are :

1. an all-water route to India: these routes involve various water bodies such as the South China Sea, Indian Ocean, Persian Gulf, the Red Sea, etc. Through these water bodies, a lot of commercial activities involving Europe and Asia took place.

2. a combination of land and water route: this is evident in the Silk Route, which comprised various routes both on land and water. In it, there is a combination of northern, southern, southwestern, and maritime routes. All of these routes serve as trading routes connected to Europe and China.