The correct option is D Bear basidiocarps
Rust, smut and mushroom belong to phylum basidiomycetes of kingdom Fungi. In these fungi, basidiospores are exogenously produced on the basidium. The basidia are arranged in fruiting bodies called basidiocarps.
Rust is a parasitic fungi, smuts are mostly Ustilaginomycetes which causes plant disease and mushroom is fungi which grows above ground.
So, the correct answer is 'bear basidiocarps'.