Answer is Matthew C Perry
To reform means to change or improve something by correcting faults.
The correct answer is: D) It allowed German rulers to choose the religion of their states. This treaty was signed in 1555 by the <em>Holy Roman Emperor Charles V</em> and the<em> Schmalkaldic League</em> to put an end to the struggle between Lutheranism or Roman Catholicism, giving rulers the ability to choose either one as the official confession of their state.