Answer:
option:B
Explanation:
We know that for any given function f(x) the transformation of the type f(x+h) is a shift of the function either right or left. if this h<0 then the shift is a right shift;and if this h>0 then the shift is a left shift by h-units.
here we are given that g(x)=f(x+6)
so, here h=6>0, hence the shift is a left shift by 6 units.
Hence, option B is correct.