What is Jacob seeing here?

Jacob is looking through a traffic log that was captured using Wireshark. Jacob has come across
what appears to be SYN requests to an internal computer from a spoofed IP address. What is
Jacob seeing here?

A.
Jacob is seeing a Smurf attack.

B.
Jacob is seeing a SYN flood.

C.
He is seeing a SYN/ACK attack.

D.
He has found evidence of an ACK flood.