Experiments led the Army to a simple method of overcoming this problem. Scouts ahead of a main body of trooops are trained to shake snow from evergreen bushes, creating a dotted line as they cross completely snow-covered landscape. Even the scouts themselves throw lightweight, dark colored objects _______ on which they too can focus. A) landscape B) lost C) blurred D) increasing E) surveyed F) away G) determined H) arrested I) defined J) shifts K) obscured L) expanse M) offset N) ahead O) sore