The variable that checks for availability of SSL support is . . . . . . . .

Answer: Option A

This question is about finding the variable that tells us if MySQL supports SSL. SSL (Secure Sockets Layer) is a way to make connections more secure. Here's what each option means: * Option A: have_ssl - This is a possible variable name. * Option B: has_ssl - This is a possible variable name. * Option C: avail_ssl - This is a possible variable name. * Option D: ssl_avail - This is a possible variable name.
To find the correct answer, we need to look at the MySQL documentation or use a MySQL command to check the available variables.
The correct answer is Option B: has_ssl. This variable will tell you if SSL is supported by your MySQL installation.