In which revision is Clause 2 dependent on Clause 1? Clause 1: Marco is wearing shorts and a T-shirt. Clause 2: It is a chilly morning

A. Even though Marco is wearing shorts and a T-shirt, it is a chilly morning
B. While Marco is wearing shorts and a T-shirt, it is a chilly morning.
C. Marco is wearing shorts and a T-shirt though it is a chilly morning
D. Marco is wearing shorts and a T-shirt, but it is a chilly morning​