Select the correct answer.
which statement is correct with respect to f(x) = -3|x − 1| + 12?

a.
the v-shaped graph opens upward, and its vertex lies at (-3, 1).

b.
the v-shaped graph opens downward, and its vertex lies at (-1, 3).

c.
the v-shaped graph opens upward, and its vertex lies at (1, -12).

d.
the v-shaped graph opens downward, and its vertex lies at (1, 12).