Sentence 4 because it summarizes the paragraph but does not give an opinion like answer but used factual evidence to support it.
Relevance is ordinarily a necessary condition, but not a sufficient condition, for the admissibility of evidence. For example, relevant evidence may be excluded if its tendency to prove or disprove a fact is heavily outweighed by the possibility that the evidence will prejudice or confuse the jury.
The speed and accleration of a car travelling in reverse and in the normal direction is the same. Therefore the measurement of its speed is still done using the metric system or via miles per hour (mph).
