Why do SNMP counters often show different numbers than Cisco IOS CLI show commands?

A.
The counter output from a CLI show command cannot be reset on interfaces.

B.
SNMP counters use SNMPv3 values, whereas CLI show commands use SNMPv2 values

C.
SNMP uses 64-bit counters, whereas CLI show commands use 32-bit counters.

D.
The only way to reset the SNMP counters is to reload the box.