What is the most logical next event?

A set of instruction is seen with diagrams. A man uses a tool to repair individual links of a bike chain. the bike chain

pick from the following.
+is too long to replace..
+is fastened back together on the bike gears using a specialized tool..
+is then bent, and a man uses pliers to fix the chain..
+is then reassembled before a tutorial..
is fastened back together on the bike gears using a specialized tool.