The voltage (V )produced by an alternating current generator is V(t)=229sin (120πt). What are the amplitude and period of V(t)?
 
 A. amplitude: 114.5  period: 1/60 
 B. amplitude: 229      period: 1/60 
 C. amplitude: 229       period: 120π
 D. amplitude: 229       period: 60
 E. amplitude: 458        period: 1/60