|Question 21Verbal

Source Texts

Text
While the greater adjutant can be found in places like the Central Tanintharyi Coast in Myanmar and the Prek Toal Bird Sanctuary in Cambodia, more than 80 percent of this endangered stork species is found in Assam, India. There, wildlife biologist Dr. Purnima Devi Barman is on the front lines of conservation efforts that, through community involvement and scientific ________ aim to bring adjutants back from near extinction.
Which choice completes the text so that it conforms to the conventions of Standard English?
study
A
study,
B
study:
C
study—
D