SAT

London

23 January, 13:26

A scientist is investigating the cause of a foul smell in the river water of a specific location. Four residents of the location responded to questions asked by the scientist. The chart below shows their responses.

Questions Resident 1's answer Resident 2's answer Resident 3's answer Resident 4's answer

Do you work at the factory near the river? Yes No No Yes

Do you use the river water for daily chores? Yes No Yes Yes

Are you related to anyone who works in the factory near the river? No No Yes Yes

Which resident is most likely to provide reliable and unbiased information?

Resident 1

Resident 2

Resident 3

Resident 4