Sentence Correction

Widely expected budget cuts forced by the ongoing state financial crisis have begun to impact highway maintenance, the state pension fund, and a variety of popular public services that have raised the number of granted or mandated work furloughs to almost double.

public services that have raised the number of granted or mandated work furloughs to almost double
public services that raised the number of granted or mandated work furloughs almost double
public services that doubled the number of granted or mandated work furloughs
public services and have already doubled the number of granted or mandated work furloughs
public services and then doubled the number of granted or mandated work furloughs

OA is D

This is a compound predicate. Have begun and have...doubled is correct.