Opponents of Measure A, which would hike San Diego County’s sales tax by a half-cent to fund infrastructure projects, announced on Tuesday that they’ve filed a lawsuit challenging the accuracy of supporters’ ballot statements. It’s the second court action involving the veracity of local ballot arguments. A judge said he would rule next week on the statement provided by opponents of Measure B, a planned residential development in the Lilac Hills section of Valley Center. The San Diego Association of Governments placed Measure A on the ballot, and it has received the blessing of the San Diego County Taxpayers Association.