[PUC-RS 2016] In picture 3, the pronoun “that” co...

In picture 3, the pronoun “that” could have been omitted without a change in meaning. Mark the alternative in which “that” can not be omitted.

I didn’t realize that Mafalda had gone to hospital.

Mafalda is the girl that suffered an accident.

Mafalda thinks that she’s in trouble now.

Everybody knows that being in hospital can be hard.

The truck driver never thought that he could run over someone.