A. Yes, this is a good idea, but it is not required. Take time to review the faculty roster and to learn about the professors’ areas of research before reaching out to introduce yourself to a potential advisor. Please do not request phone calls or Zoom meetings; email exchanges, often extended, work well for these initial introductions.
Please also take note that the admissions committee reviews all of the applications and makes the final decisions across all fields. No advisor has a say in the final admissions decisions.