2-C. For a moment, I imagine running to my grandfather's house to show him this incredible discovery.For a moment, I imagine running to my grandfather's house to show him this incredible discovery.
3-C. Clearly, vinegar was an important discovery for ancient civilizations which remains useful even today.Clearly, vinegar was an important discovery for ancient civilizations which remains useful even today.
4-C. Considering the role of dance in our lives can lead to interesting discoveries about the history or values of our own society.Considering the role of dance in our lives can lead to interesting discoveries about the history or values of our own society.