What is a possible reason for this?

Examine the IPS sensor configuration and forward traffic logs shown in the exhibit; then, answer the question below.

An administrator has configured the WINDOS_SERVERS IPS sensor in an attempt to determine whether the influx of HTTPS traffic is an attack attempt or not. After applying the IPS sensor, FortiGate is still not generating any IPS logs for the HTTPS traffic.

What is a possible reason for this?
A . The IPS filter is missing the Protocol: HTTPS option.
B . The HTTPS signatures have not been added to the sensor.
C . A DoS policy should be used, instead of an IPS sensor.
D . A DoS policy should be used, instead of an IPS sensor.
E . The firewall policy is not using a full SSL inspection profile.

Answer: E