a) reason: because, so
b) result: first, next, after that, finally
B.
first, next, after that, finally
C.
Yesterday morning, when I woke up, first I got dressed up. Next, I went in the kitchen to have breakfast. This had happened at bout 7 am. After that, I took my schoolbag and headed to school. After waiting for about a half n hour, the bus still didn't come, so I was thinking, that today I'm going to be late for school. At 7:45 the bus finally arrived at the bus stop. Everybody was arguing with the driver, accusing him of ignornce, for because of him, many of them had been late for work.