EUROPEAN COMPANIES ACT TO WARD OFF CORONAVIRUS

Câu hỏi: Read the following passage and mark the letter A, B, C, or D to indicate the correct word or phrase that best fits each the numbered blanks.
For weeks, the coronavirus outbreak in China rattled global supply chains, exacting a toll on major businesses around the world, though often in indirect ways. Now, as it spreads across Europe and Asia, the virus is becoming a more immediate threat to (34)_______ types of businesses. From Milan to Berlin to London, companies in practically every industry are (35)_______ their emergency protocols or sending employees home to try to preven an outbreak.
This week, Chevron instructed 300 workers at one of its London offices to work from home (36)_____ an employee returning from Italy developed flu-like (37)_______. The media group OMF has taken the same step in the Fitzrovia district of London, sending home around 1,000 employees after a staff member (38)______ recently passed through Singapore began showing symptoms.
Adapted from The New York Times
The word or phrase which best fits the gap (35) is...
A. defining
B. refining
C. containing
D. observing