To help establish coherence is a compare and contrast essay, which of the following transitions would best show a comparison between ideas?
A. however
B. likewise
C. further
D. for example
Is the answer D?
B, C, and D all would be used to show comparison.
A would be used to show contrast.
http://grammar.ccc.commnet.edu/grammar/transitions.htm
Scroll down in the chart until you see the sections on comparison and contrast.