Which of the following group of “signal words” would indicate a contrast? A: both, however, therefore, for that reason
B: Remember that, however, unlike, otherwise
C: Additionally, compared with, however, conclusively
D: Then again, although, however, on the other hand

I would go with B.

Explanation: The group of words for option B seem like they would be used more for contrasting than option D. It can't be option A or option C because those options use comparing signal words.

martians or other types of aliens represent a unique fear as opposed to zombies. vampires and other types of monsters.   in most sci-fi stories, aliens come from other worlds and have different or more advanced technology.   abductions and experimentation on human bodies that involve these technologies, or the use of these technologies against human beings and the use of unknown "powers", are a type of fear that's different from that of other types of monsters.  

answer: c

explanation: