We arrived safely at the quay and went ashore.

Option B is the correct answer.

"Quay" refers to a structure built on the shore of a harbour where ships dock to load and unload cargo or passengers. Option B) "Wharf" is the word most similar in meaning to "quay." A wharf is similar to a quay, serving as a dock or platform along the shore for ships.

Option A: Peninsula is a landmass surrounded by water on most sides but still connected to the mainland. It doesn’t relate to the meaning of quay.

Option C: Target means an object or goal aimed at, which has no relation to the meaning of quay.

Option D: An island is a piece of land surrounded by water, which is unrelated to a quay.