Why did the author feel encouraged after the #Flatten TheCurve hashtag trended on Twitter?

A.)It suggested that people were listening to experts' advice on how to control the spread of the
coronavirus.
B.)It showed that people were confused about why they needed to stay away from public spaces.
C.)It suggested that epidemiologists had found a reliable way to share information about the coronavirus.
D.)It showed that social media companies were helping to spread awareness about the coronavirus.