La fuerza de repulsión entre dos esferas es de 2 micro N. Si cada una de las esferas lleva una carga de - 6 micro C. ¿Cuál es su separación?

Which one of the following is the correct rhyme to keep in mind when using the spanish counterparts to this, that, those and these? a: “that” and “those” both have s’s, “this” and “these” don’t b: “that” and “those” both have t’s, “this” and “these” don’t c: “this” and “these” both have s’s, “that” and “those” don’t d: “this” and “these” both have t’s, “that” and “those” don’t