This task is about writing a correct answer for the reading comprehension task. Based on the information provided in a given passage, you should identify the shortest continuous text span from the passage that serves as an answer to the given question. Avoid answers that are incorrect or provides incomplete justification for the question.

Passage: There were 46,917 households, out of which 7,835 (16.7%) had children under the age of 18 living in them, 13,092 (27.9%) were opposite-sex married couples living together, 3,510 (7.5%) had a female householder with no husband present, 1,327 (2.8%) had a male householder with no wife present. There were 2,867 (6.1%) unmarried opposite-sex partnerships, and 416 (0.9%) same-sex married couples or partnerships. 22,716 households (48.4%) were made up of individuals and 5,551 (11.8%) had someone living alone who was 65 years of age or older. The average household size was 1.87. There were 17,929 families (38.2% of all households); the average family size was 2.79. Question: What percent of household have children under 18?
16.7%

Passage: Photorespiration can occur when the oxygen concentration is too high. Rubisco cannot distinguish between oxygen and carbon dioxide very well, so it can accidentally add O2 instead of CO2 to RuBP. This process reduces the efficiency of photosynthesis—it consumes ATP and oxygen, releases CO2, and produces no sugar. It can waste up to half the carbon fixed by the Calvin cycle. Several mechanisms have evolved in different lineages that raise the carbon dioxide concentration relative to oxygen within the chloroplast, increasing the efficiency of photosynthesis. These mechanisms are called carbon dioxide concentrating mechanisms, or CCMs. These include Crassulacean acid metabolism, C4 carbon fixation, and pyrenoids. Chloroplasts in C4 plants are notable as they exhibit a distinct chloroplast dimorphism. Question: When does photorespiration happen?
when the oxygen concentration is too high

Passage: Under Governor Miguel Ahumada, the education system in the state was unified and brought under tighter control by the state government, and the metric system was standardized throughout the state to replace the colonial system of weights and measures. On September 16, 1897, the Civilian Hospital of Chihuahua was inaugurated in Chihuahua City and became known among the best in the country. In 1901 the Heroes Theater (Teatro de los Héroes) opened in Chihuahua City. On August 18, 1904, Governor Terrazas was replaced by Governor Enrique C. Creel. From 1907 to 1911, the Creel administration succeeded in advancing the state's legal system, modernizing the mining industry, and raising public education standards. In 1908 the Chihuahuan State Penitentiary was built, and the construction on the first large scale dam project was initiated on the Chuviscar River. During the same time, the streets of Chihuahua City were paved and numerous monuments were built in Chihuahua City and Ciudad Juárez. Question: Under which governor was the education system unified?

Miguel Ahumada