Which of the following is an example of a true scientific theory a) if a woman has a heart burn during pregnancy her baby will be born with a lot of hair b) throwing a pinch of salt over your shoulder is good luck c) if you break a mirror you will have 7 years of bad luck d) sterilizing equipment prevent contamination

Apperently, Im going with the answer C) if you break a mirror, you will have 7 years of bad luck

Answers A, B, and C all are non-factitious assertions. However, answer D is true. Unlike the other three answers, it has proof to it. If you sterilize equipment, therefore removing harmful bacteria from the equipment, the said equipment is less likely to become contaminated.

The question asks which answer shows an example of a true scientific theory.

Answer D is the only answer that complied with that rule set.

In conclusion, the answer is D.

Yeah, but what are you trying to ask?