In the AC dual-link cold standby network, when the priority of the active and standby ACs is the same, which condition will the AP compare to select the active AC first?

In the AC dual-link cold standby network, when the priority of the active and standby ACs is the same, which condition will the AP compare to select the active AC first?
A . Compare the AP load on the AC , and prefer the AC with a small load as the main AC
B . Compare the size of the source IP of the AC , and prefer the AC with the smaller IP as the main AC
C . Comparison of AC traffic on select small flow of AC as the main AC
D . Compare the STA load on the AC , and prefer to select the AC with a small load as the main AC

Answer: A