The term for this would be gastritis
The answer is fungi imperfecti or imperfect fungi which are also known as Deuteromycota, are fungi which do not classify into the commonly recognized taxonomic classifications of fungi that are based on biological species thought or morphological features of sexual structures because their sexual form of reproduction has never been observed. Merely their asexual form of reproduction is recognized in which means that these fungi yield their spores asexually in the procedure named sporogenesis.
Comparing the genomes of each species to see which are most similar
the answer is a because if the model is based on experimental data it wont be good unless it has been tested.