Reducing Resistance: True/False Answers

[BMWPower06]

Homework Statement

You have a tungsten wire with a certain length and cross-sectional area. This wire has a resistance R. If you wanted to make a new wire with a SMALLER resistance, which of the following changes would accomplish that objective?
True False use a piece of copper wire instead, with the same length and cross-sectional area
True False increase the temperature of the wire
True False use a thicker piece of tungsten wire, with the same length
True False use a longer piece of tungsten wire, with the same cross-sectional area
True False decrease the voltage between the ends of the wire

Homework Equations

V=IR
R=p(L/A)

The Attempt at a Solution

My answers are in bold, atleast one of them is wrong, but i do not know which one, can anyone help out?

Reason for answers:
1. Copper wire has a lower p so the R will be lower
2. Increasing Temp, increases the R
3. Increases A, which decreases R
4. Increases L which increases R
5. R=V/I so a lower V would mean a smaller R

I can't figure out which answer is wrong, any help?

 

[BMWPower06]

Anyone know what I am doing wrong?

 

[Dick]

Think really hard about 5) again. Decreasing V decreases I, not R.