|Question 4Verbal

Source Texts

Text
Difficulties of documenting nocturnal pollinator visits and a general focus on diurnal invertebrate pollinators, such as _Volucella bombylans_, have resulted in ______ of information on nocturnal moth pollination of plants such as _Rubus fruticosus L. aggregate_, but Max Anderson et al. have addressed this by utilizing infrared technology.
Which choice completes the text with the most logical and precise word or phrase?
an abatement
A
an aggregation
B
a dearth
C
a dissonance
D