37 Dr. McKenzie has spent the past four years catching snowflakes, putting them under a microscope, andtaking pictures. He is interested in snowflakes because they are so complicated that scientists do notcomprehend them thoroughly.Why is Dr. McKenzie interested in snowflakes?
(A) Studying snowflakes is not time-consuming.
(B) Snowflakes are beautiful and crystal clear.
(C) Scientists do not fully understand them.
(D) Dr. McKenzie would like to study something that can be examined under a microscope.