sat-dog

Choice D is correct. It's given that the length of the base of the parallelogram is $89\%$ of the height of the parallelogram. Since $h$ is the height of the parallelogram, it follows that the length of the base of the parallelogram can be represented by the expression $\frac{89}{100}h$, or $0.89h$.

Choice A is incorrect. This expression represents $\mathrm{8,900}\%$, not $89\%$, of the height of the parallelogram.

Choice B is incorrect. This expression represents $8.9\%$, not $89\%$, of the height of the parallelogram.

Choice C is incorrect. This expression represents $890\%$, not $89\%$, of the height of the parallelogram.