Answer:
C) Of course; Then again
Step-by-step explanation:
The sentence deals with contrasting yet common pinion of the speaker. So, to make the sentence in a plausibly correct sentence, the word pairings of "Of course and Then again" should be used. Then the sentence becomes
I am of two minds on this issue.Of course, I feel strongly that freedom should not ever be restricted.Then again, there are times when we may have to temporarily forfeit our rights for the sake of our safety.
The first choice agrees with the claim. But the use of "then again" gives the other side of the opinion while not exactly refuting the preceding claim. The there given word pairing option are not usable for their standing with the passage can't really support the claims made in it.