Match the Type of Scheduling Method with Its "Pro" or "Con

Match the type of scheduling method with its "pro" or "con." Note: Answers may be used more than once.
-​When an unexpected problem presents and sufficient time has not been allotted,subsequent visits may be delayed

A) clustering-pro
B) ​clustering-con
C) ​double-booking-pro
D) ​double-looking-con
E) walk in/Open hours-pro
F) ​walk in/Open hours-con
G) ​single-booking-pro
H) ​single-booking-con
I) ​streaming-pro
J) ​streaming-con
K) ​wave-pro
L) ​wave-con
M) modified wave-pro
N) modified wave-con