The total energy of a 0.050 kg object travelling at 0.70 c is
a) 2.10 × 107 j
b) 3.06 × 107 j
c) 2.46 × 1015 j
d) 6.30 × 1015 j
e) 8.82 × 1015 j

Would presume the energy as kinetic energy.

E = (1/2)*mv²

But m = 0.05kg, velocity here = 0.70c, where c is the speed of light ≈ 3* 10⁸ m/s

Ke =  (1/2)*mv² = 0.5*0.05*(0.7*3* 10⁸)² = 1.1025 * 10¹⁵ Joules

There is no exact match from the options.