(AP)- A new study says 16 states – including four in New England – don’t give soldiers deployed overseas enough time to vote.

The Pew Center on the States says faulty absentee voting systems could be improved by allowing more lead time or sending election materials electronically.

In New England, the study gave failing grades to Connecticut, Maine, Massachusetts and New Hampshire. It says Vermont’s system is borderline, and Rhode Island’s raises privacy and security concerns.

Researchers calulatedtheamount of timeit takes overseasmilitary voters and election officialsin each state to complete each step of the absentee voting process.