The Following Questions Are Based on the Description Below

The following questions are based on the description below.
Rose-picker's disease is caused by the yeast, Sporothrix schenkii. The yeast grows on the exteriors of rose-bush thorns. If a human gets pricked by such a thorn, the yeasts can be introduced under the skin. The yeasts then assume a hyphal morphology and grow along the interiors of lymphatic vessels until they reach a lymph node. This often results in the accumulation of pus in the lymph node, which subsequently ulcerates through the skin surface, and drains.
-The photosynthetic symbiont of a lichen is often a(n)

A) moss.
B) green alga.
C) brown alga.
D) ascomycete.
E) small vascular plant.