See the multi-choice question below:

Sentence 1: This proved highly dangerous to pilgrims who approached the abbey across the sands (the causeway joining the island to the mainland was not built until 1874).

Sentence 2: The pilgrims accessed the roads leading to the abbey with no trouble.

If the first sentence is true, then is the second sentence true?
Choose from:
* yes
* it is not possible to tell
* no
no