PLEASE HELP! Which expression is in its simplest form?

A. 7/8

B. /21

C. 9/9

D. 3/24

I think the answer would be b

step-by-step explanation:

here's what happens:

1) the graph of f   = x^2 is shifted 2 units to the right.

2) the resulting graph is reflected in the x-axis, so that the parabola now opens down.

3) this final result is transformed up by 5 units.

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step-by-step explanation: