Diazonium salt decomposes as $ C_6H_5N^{+}_2CL^{-} \longrightarrow C_6H_5Cl+N_2$

Question

$(A)\;\text{a first order reaction } \\ (B)\;\text{a second order reaction } \\(C)\;\text{independent of the initial concentration of the salt } \\(D)\;\text{a zero order reaction } $