Haploid Dictyostelium Replicate by Mitosis When Nutrients Are Plentiful

Haploid Dictyostelium replicate by mitosis when nutrients are plentiful.What happens when growth conditions deteriorate?

A) The cells change morphologically into a resilient structure called a cyst.
B) The cells change into a gamete and fuse with another gamete to produce a zygote.
C) The cells become motile by means of a flagellum and move on to another food source.
D) The cells aggregate to form a multicellular slug.
E) The cells stop growing.