Answer:
The answer the is B, thank me later
Explanation:
C. The cyclists had ridden from one end of the island to the other.
Sentence provides commentary information for elaboration of a concrete detail.
D) It was a good idea to wear short sleeves and a light jacket that could be taken off easily in the afternoon.
The concrete detail:
short sleeves and a light jacket
The commentary information for elaboration of the concrete detail:
that could be taken off easily in the afternoon.