What is the best way to revise the last sentence?

Read the sentences from a student's essay about "The
Treasure of Lemon Brown."
In this story, Lemon Brown make a great impact on Greg
by showing him the value of the bond between fathers
and sons. Greg then appreciates his own father better,
despite his father's shortcomings.

O replace "Greg then" with "In conclusion, Greg"

O replace "Greg then" with "Therefore, Greg"

O replace "Greg then" with "Consequently, Greg"

O replace "Greg then" with "So, Greg"