How do i conjugate the present perfect subjunctive?

Sheila conducts an investigation to see how the amount of salt dissolved in water affects the density of the water whichstatement best describes the correct plan for her procedure? the density and the amount of water are controls, and the amount of salt and the type of salt are variablesthe amount of water and the amount of salt are controls, and the type of salt and the density are variablesthe type of salt and the amount of water are controls, and the amount of salt and the density are variablesthe type of salt and the density of water are controls, and the amount of salt and the amount of water are variableso

Choose the best spanish equivalent to the phrase. our families went to japan last year. nuestras familias fueron a japón el año pasado. nuestras familias fue a japón el año pasado. nuestras familias ir a japón el año pasado. nuestras familias fui a japón el año pasado.

Read the dialogue and choose the option with the correct noun to complete the sentence. —buenos días, ¿dónde está ana? —ana está en la oficina. —¿ustedes son los padres de la madre de ana? —sí, somos sus