Answer:
Expost Facto Research
Step-by-step explanation:
Expost Facto Research is also referred to as 'after the fact' research. It implies that researcher conducts the research procedure & analysis, after the determining event / variable has already occurred, without any interference of researcher.
'Analysing a person's conscious experience resulting from the end of a marriage' : reflects to observe the impact of an ended marriage, which has already happened (marriage ended) in the person's life. The marriage ending circumstances were completely un-intervened by the researcher. So, analysing the effect of already ended marriage on a person's life is an 'Ex Post Facto Research'
Ethnography is study of various ethnic groups, Experimental involves treatment on variables done by experimenter (researcher). So, these are inapt.