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With restaurants, stores and even public pools and beaches now open after months of being shuttered, some New Yorkers might wonder whether it's safe to swipe their Metrocards again and hop on the train or bus. Interim MTA President Sarah Feinberg says, "It's time to come back." In May, the MTA restricted its otherwise 24/7 service and began shutting down trains from 1 a.m. to 5 a.m. [1] so that the company could completely sanitize each car.
"We're doing 24/7 cleaning," Feinberg tells Newsweek. "But, it obviously is helpful for us to be able to have the system completely free of all riders in those overnight hours, [2] in order that we can be particularly efficient."
In the beginning of March, [3] when the virus began affecting New York City, MTA workers were not allowed to wear masks while on duty - in alignment with the CDC recommendations at the time. The ban was then lifted [4] after there was a backlash from the Transport Workers Union Local 100, the New York Daily News reported. The MTA reports that 4,110 MTA employees have tested positive for the virus as of July 29.
(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)

Which subordinate clauses highlighted in the text contain subordinators used to indicate PURPOSE?
A 1 and 2
B 2 and 3
C 3 and 4
D 1 and 4
E 2 and 4