If flying height of a spacecraft is H, the length of air base is B and the parallax difference between two points is dp, then the difference in height

A. $${\text{h}} = \frac{{{\text{dp}}}}{{\frac{{\text{B}}}{{\text{H}}}}}$$

B. $${\text{h}} = \frac{{\text{B}}}{{\text{H}}} \times {\text{dp}}$$

C. $${\text{h}} = \frac{{{\text{dp}}}}{{\frac{{\text{H}}}{{\text{B}}}}}$$

D. $${\text{h}} = {\text{BHbp}}$$

Answer: Option A