The synthesis of 3-octyne is achieved by adding a bromoalkane into a mixture of sodium amide and alkyne. The bromoalkane and alkyne, respectively, are
A. (a) `BrCH_2CH_2CH_2CH_2CH_3` and `CH_3CH_2C-=CH`
B. (b) `BrCH_2CH_2CH_3` and `CH_3CH_2CH_2-=CH`
C. (c) `BrCH_2CH_2CH_2CH_2CH_3` and `CH_3C-=CH`
D. (d) `BrCH_2CH_2CH_2CH_3` and `CH_3CH_2C-=CH`
