A bronze bell containing copper and tin is a. pure substance
b. colloidal suspension
c. a solid solution
d. heterogenous mixture

C. Sold solution

Explanation:

Using method of elimination;

A. Pure substance.

Bronze is not a Pure substance because the proportions of copper and tin are not the same in all  bronze. This option is wrong.

B. Colloidal Suspension

This option is wrong. Colloidal suspension involves one substance dispersed in another.

C. Sold solution

The bronze bell is an alloy. This definition suitable represents it. It is a solid solution containing copper and tin. This is the correct option.

D. Heterogeneous Mixture

Bronze is a mixture, however it is homogeneous and not heterogeneous. his is because one can not distinguish the copper from the tin in the mixture.