I second A and C. For several reasons, I would not run full power on the ground for any longer than necessary. Cooling is very poor. and potential for prop damage are two of the reasons. The EGT's will not be balanced, so you risk cooling one cylinder, while accomplishing not much on another.
If you're using the Lycoming technique which A and C offers, have a care as to what the prop is over, even 1800 RPM for a minute over gravel or loose asphalt can trash a prop. The prop on my 150, which I have owned for 33 years, has never needed to be dressed, because I am very careful where I power up.