As I slung my pack onto my shoulders a big mosquito thudded against my cheek. There had been a few through the day, but it was early in the season - the ice had gone out just two weeks before - and I had scarcely noticed them. But now as I would down the ridge, the last breeze faded, and they were on me. Rising in clouds from the soggy tundra, they pelted against my face. I reached in my pocket for the repellent, and came up empty.
The traveller carried with him

Options

A. Mosquito repellent
B. A pack of food
C. A sling
D. A back-pack