\(B = \left( {1 - \frac{1}{3}} \right)\left( {1 - \frac{1}{6}} \right)\left( {1 - \frac{1}{{10}}} \right)\left( {1 - \frac{1}{{15}}} \right) \ldots \left( {1 - \frac{1}{{780}}} \right)\)
A.\(B = \frac{{41}}{{117}}\)
B.\(B = \frac{{41}}{{39}}\)
C.\(B = \frac{{39}}{{41}}\)
D.\(B = \frac{{13}}{{41}}\)