Which transition word signals a contrast?

a eventually
b because
c however
d finally

c however

The transition word that signals a contrast is "c) however."

The transition word that signals a contrast is "c) however." To determine the answer, you can go through each option and assess its function in a sentence.

a) "Eventually" indicates the progression of events over time, rather than a contrast.

b) "Because" is a conjunction that introduces a reason or cause, not a contrast.

c) "However" is commonly used to introduce a contrasting or contradictory statement. It shows a shift or deviation from the previous information or idea.

d) "Finally" is an adverb that typically denotes the last step or conclusion in a sequence, rather than a contrast.

Therefore, the correct answer is "c) however."