Review the excerpt below. [1] A water district is selecting neighborhoods for the first phase of a pipeline survey. [2] Although several neighborhoods requested surveys, the neighborhoods whose water lines are oldest, will be inspected first. [3] Several areas requested inspections, but the oldest infrastructure presents the greatest risk. [4] Later phases will cover lower-priority areas. [5] Engineers will compare pipe age, material, and repair history. Which choice follows standard English conventions for the restrictive clause in sentence 2?