What is the current taxonomic status of Nowickia Wachtl, 1894 in relation to Tachina Meigen, 1803?

A. Nowickia is a species within the genus Tachina
B. Nowickia is a valid genus and is treated separately from Tachina
C. Nowickia is a synonym of Tachina and is no longer used
D. Nowickia is a subgenus of Tachina
Answer: 