x≥0 restricts to the right half plane (Quadrants I and IV).
Testing (0.3, 0.3) in Q-I: all three constraints satisfied.
Testing (0.3, -0.3) in Q-IV: x+y=0≤1 and x−y=0.6≤1, all satisfied.
Thus the feasible region lies in Quadrants I and IV, matching statements B and D.
Note: The original key marks (3) which has a lowercase typo 'c'; mathematically B and D are the correct pair, so we select option (2).