A textbook weighs 2.5 pounds. how many kilograms does the textbook weigh? Round your answer to the nearest tenth of a pound. 1kg ≈ 2.2 lb

A. 1.1 kg
B. 1.8 kg
C. 5.5 kg
D. 4.7 kg

I'll mark brainliest for the 1st correct answer.