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Virologist at Columbia University Angela Rasmussen suggests avoiding public transportation, if possible, especially if crowded.
"Any type of public transportation that has a lot of people crowded together in an enclosed, poorly ventilated space is an environment with increased transmission risk," Rasmussen tells Newsweek. "This especially applies to packed subway cars or public buses."
Feinberg says there is not an issue with ventilation within subway cars; in fact, MTA's numbers surpass the recommendation promoted by the CDC. [1] Though there are no standards for subway cars, the MTA has adapted the guidelines for the air exchange rates for health care facilities. She says that [2] while the recommendation from the CDC is 10 times per hour, the subway's numbers are upwards of 16 or 18 times per hour. "It doesn't mean we are perfect, we are always looking for what else we can do," Feinberg says."But we are in a pretty good place there."
The issue of crowding, though, is really up to the rider, Feinberg adds. Patience is key, the virologist explains. [3] If a train pulls up that is too crowded to allow for appropriate social distancing, then wait for the next one.
(SCHONFELD, Alexandra. How Safe Is the New York City Subway Right Now? 2020. Newsweek Magazine. Available at: https://www.newsweek.com/how-safe-new-york-city-subway-right-now-1521844. Accessed August31st, 2021)

What is the function of the Adverbial Clauses [1], [2], and [3] respectively?
A Time, Place, Manner
B Contrast, Time, Condition
C Reason, Purpose, Result
D Manner, Contrast, Place
E Place, Condition, Reason