1. Graph opens downwards, so a < 0. The y-intercept is positive, so c > 0. This matches option A.
2. Graph opens upwards, so a > 0. The y-intercept is positive, so c > 0. This matches option Б.
3. Graph opens upwards, so a > 0. The y-intercept is negative, so c < 0. This matches option B.
Answer: 1 - A, 2 - Б, 3 - B