1-C. It is not easy to resolve this issue because being in a particular time zone has important consequences for Indiana residents.It is not easy to resolve this issue because being in a particular time zone has important consequences for Indiana residents.
3-C. The controversy over time in Indiana was partly resolved in 2006, when the entire state started to observe DST.The controversy over time in Indiana was partly resolved in 2006, when the entire state started to observe DST.