What is most likely taking place?

The following is a sample of output from a penetration tester’s machine targeting a machine with
the IP address of 192.168.1.106:

What is most likely taking place?

A.
Ping sweep of the 192.168.1.106 network

B.
Remote service brute force attempt

C.
Port scan of 192.168.1.106

D.
Denial of service attack on 192.168.1.106