Read the sentence from the section "States pass laws to stop communist activities."
HUAC decided to investigate
communist infiltration of the film
industry, which it believed was full
of communists.
Which option is the BEST definition of the word
"infiltration" as used in the sentence above?
A
to exercise power in a group
B
to gain political advantage in a group
с
to cause harm to a group
D
to secretly become part of a group