The clues will _____ the suspect's guilt.

• A. Income
• B. Indicate
• C. Indigenous
• D. Index

Answer: (B)

Choosing a verb that shows how evidence points to a conclusion is the key idea here. The sentence needs a word that means to point to or show something as true. Indicate fits perfectly because it means to signal or reveal a fact based on evidence, so “The clues will indicate the suspect's guilt” communicates that the clues point toward guilt without claiming it with absolute certainty.

The other options don’t fit as naturally. Income is a noun referring to earnings, not a verb. Indigenous is an adjective describing origin or native status, not something the clues would do. Index can be a verb, but it typically means to catalog or organize data, not to reveal or point to guilt, making it awkward in this context.