Tritium (³H)has a Half-Life of 12

Tritium (³H) has a half-life of 12.3 years and releases 0.018 6 MeV energy per decay.What is the activity of a 1.0-gram sample of tritium? (N_A = 6.02 x 10²³ mol^-1,1 year = 3.16 x 10⁷ s,1 MeV = 1.6 x 10^-13 J,and m_t = 3.016 05 u)

A) 1.1 x 10¹⁵ Bq
B) 3.2 x 10¹⁵ Bq
C) 3.6 x 10¹⁴ Bq
D) 1.3 x 10¹⁶ Bq