If a user has locked a row in a table with a shared lock, which of the following is possible?
A. Another user can delete the row at the same time the original user has a shared lock on that row.
B. Another user can lock that same row at the same time with an exclusive lock.
C. Another user can update the row at the same time the original user has a shared lock on that row.
D. Another user can lock that same row at the same time with another shared lock.