The angle of elevation of the top of a tower, vertically erected in the middle of a paddy field, from two points on a horizontal line through the foot of the tower and opposite side of the tower are given to be α and β (α > β). The height of the tower is h unit. A possible distance (in the same unit) between the points is:

• A. \(\frac{{h\left( {\cot \beta - \cot \alpha } \right)}}{{\cos \left( {\alpha + \beta } \right)}}\)
• B. h(cot α - cot β)
• C. \(\frac{{h\left( {\tan \beta - \tan \alpha } \right)}}{{\tan \alpha \tan \beta }}\)
• D. h(cot α + cot β)