This is a test of commonsense with single/multi-choices. Complete the next sentence:

How to avoid or lessen your ironing
Iron the essentials only.
Instead of ironing everything, try only ironing your actual clothes. Things like underwear, bedding, and towels may never need to be ironed.

Choices:
(a). Go through your ironing pile and remove anything that isn't wrinkled clothes. Buy clothes in synthetic or blended fabrics..
(b). An article of underwear is perfect for this purpose. Don't wear a new or expensive shirt once you're done ironing so it will go into your ironing machine (a flat iron is what we use)..
(c). While ironing items can be more lucrative, ironing difficult items removes the fat, friction and wrinkles that a sheet has collected from ironing. Buy or use hand-made iron items..
(d). Place 1/2 inch of iron cover across your ironing tray or counter if you're ironing multiple items. Iron your garment while it is ironing..
The answer is:
(a).