How does the MySQL server behave with incorrectly spelled options?

You adjust a default configuration to the following /etc/my.cnf on a Linux installation:
[mysqld] Loq-bin Binrylog_format=ROW You do not notice the spelling error in
binrylog_format and restart your production server. How does the MySQL server behave
with incorrectly spelled options?

A.
The server needs more cores to use all slave threads.

B.
The slave cannot process the relay log fast enough to use all threads.

C.
Mysqld prints to the error log about an unknown variable, and then exits.

D.
The slave is configured with slave_parallel_workers = 4.