Frequently, as it modifies the sentence
<span>B.
more happily.........
nvm im wrong its A the other guy is correct</span>
The Matvei Mudrov -a medical train serving isolated villages in Siberia- contains
a clinic, exam rooms, and a team of about fifteen doctors.
A.Includes a brief summary of each sources content and focus
I wish i didn't have to go. I am very busy.
Hope this helps , danielle x