Which of the following are correct?

aunt betsy somehow made it to her thirtieth birthday without changing a lightbulb; in fact, she didn't even know what one looked like.

murphy's law essentially states this: anything that can go wrong will go wrong.
she said; "ouch! "

the team's problems centered in three positions: jen layland, first base; debbie meyer, catcher; and maggie smith, left field.

for a bad day to happen, three elements are required; a stubbed toe, a bad attitude, and one car key locked in a car.