As the pressure of a gas decreases to half its original value, what happens to the volume of the gas if temperature is held constant?(1 point) Responses The volume decreases to half of its original value. The volume decreases to half of its original value. The volume decreases to one-fourth of its original value. The volume decreases to one-fourth of its original value. The volume increases to four times its original value. The volume increases to four times its original value. The volume increases to twice its original value.