The correction applied to the measured base of length ‘L’ is

A. Tension $$ = \frac{{\left( {{\text{P}} - {{\text{P}}_{\text{s}}}} \right){\text{L}}}}{{{\text{AE}}}}$$

B. Sag $$ = \frac{{{{\text{L}}^3}{{\text{w}}^2}}}{{24{{\text{P}}^2}}}$$  where w is the weight of tape/m

C. Slope $$ = \frac{{{{\text{h}}^2}}}{{2{\text{L}}}} + \frac{{{{\text{h}}^4}}}{{8{{\text{L}}^3}}}$$   where h is height difference of end supports

D. Reduction to mean sea level $$ = \frac{{{\text{Lh}}}}{{\text{R}}}$$

E. All the above

Answer: Option E