It seems here that the only option that doesn't apply is the last option:
complete sentences for transitions
Remember, the information is in the name, a keyword outline is used to show the main points of a lengthy publication or script. These are points that are used to give the gist of the whole entity but to not necessarily explain it fully.
Divide the number of batteries by the amount of packs. 40/10=4. therefore each pack has 4 batteries. a bundle of 5 packs would be 20 batteries. 1x4= 4 same as 1 pack. 4x5= 20 same as 5 packs.
