A. bow. this is a good choice because it keeps zombies at bay, while allowing you to play the ranged game and pick them off before they detect you. this weapon has drawbacks though, as you can run out of arrows quickly if you do not know what you are doing.
A. Axe. this is a good tool because you can use it to create shelter, as well as use it as a weapon if you break/run out of arrows with your main weapon. this has a drawback though, which is the range makes you have to get in closer to the zombie.
A. Flint and Steel. this has good uses, such as insta-cooking your food while it is still living, and also burning the undead, and starting campfires. the drawback to this tool is that it has very limited uses.
C. Player. this is good because a player is smarter than any NPC, it can carry out tasks unsuited to npcs, and it also helps relieve the tedium of traveling, by allowing for human interaction.
A. Walking. this is the easiest form of transport, as horses glitch, and get stuck, and yu can't battle zombies as well from horseback. minecarts you need rails to travel along, and boats need water to move efficiently. walking is the way to go.