In a simple pendulum experiment the percentage errors in the measurement of g and l are `alpha%` and `beta%` respectively then the maximum error in measuring T wil be `"________"`
A. `(1)/(2)(alpha+beta) %`
B. `(1)/(2)(alpha-beta)%`
C. `(1)/(2)(beta-alpha)%`
D. `2(beta -alpha)%`