Given set of scores= 101, 106, 116, 144, 146

We know the formula,

 $\mathrm{Average} \left(\mathrm{A}\right)=\frac{\mathrm{Sum} \mathrm{of} \mathrm{given} \mathrm{values} \left(\mathrm{S}\right)}{\mathrm{Total} \mathrm{number} \mathrm{of} \mathrm{values} \left(\mathrm{N}\right)}$

 Here,

 Sum of given values(S)

= 101+106+116+144+146

= 613

Total number of values(N)= 5

Substituting these values we get (A),

 $= \frac{613}{5}=122.6$

Hence, Option D is correct.