In the Preparation of Primary Amines,how Can Direct Nucleophilic Substitution

Multiple Choice

In the preparation of primary amines,how can direct nucleophilic substitution between NH₃ and alkyl halide be made more practical than reacting NH₃ and the alkyl halide in a 1:1 ratio?

A) Use a large excess of NH₃.
B) Use a large excess of alkyl halide.
C) Use a limited amount of NH₃.
D) Make the alkyl halide sterically hindered.